WHK Patents  

See the list at the bottom for 136 International patents from wipo.int

10,299,909 Optical device and method for modifying the refractive index of an optical material

10,271,991 Method for modifying the refractive index of ocular tissues

10,226,381 Multi-photon absorption for femtosecond micromachining and refractive index modification of tissues

9,939,558 Method for modifying the refractive index of an optical material and resulting optical vision component

9,622,912 Method for modifying the refractive index of an optical material

9,545,340 Multi-photon absorption for femtosecond micromachining and refractive index modification of tissues

9,492,323 Method for modifying the refractive index of ocular tissues

9,144,491 Method for modifying the refractive index of an optical material

 9,060,847 Optical hydrogel material with photosensitizer and method for modifying the refractive index

 8,932,352 Optical material and method for modifying the refractive index 4

8,901,190 Optical hydrogel material with photosensitizer and method for modifying the refractive index

8,617,147 Method for modifying the refractive index of ocular tissues 2

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International patents from WIPO.INT

No Ctr Title PubDate Int.Class Appl.No Applicant Inventor
1. US 20140107632 - METHOD FOR MODIFYING THE REFRACTIVE INDEX OF OCULAR TISSUES 17.04.2014
A61F 9/008
14109542 UNIVERSITY OF ROCHESTER Knox Wayne H.
A method for providing vision correction to a patient. The method includes: (a) measuring the degree of vision correction needed by the patient and determining the location and shape of refractive structures that need to be positioned within the cornea to partially correct a patient's vision; (b) directing and focusing femtosecond laser pulses in the blue spectral region within the cornea at an intensity high enough to change the refractive index of the cornea within a focal region, but not high enough to damage the cornea or to affect cornea tissue outside of the focal region; and (c) scanning the laser pulses across a volume of the cornea or the lens to provide the focal region with refractive structures in the cornea or the lens. Again, the refractive structures are characterized by a change in refractive index, and exhibit little or no scattering loss.


2. EP 2713950 - METHOD FOR MODIFYING THE REFRACTIVE INDEX OF AN OPTICAL MATERIAL AND RESULTING OPTICAL VISION COMPONENT 09.04.2014
A61F 2/16
12724845 BAUSCH & LOMB SMITH THOMAS

3. US 20130268072 - Optical Hydrogel Material with Photosensitizer and Method for Modifying the Refractive Index 10.10.2013
A61F 9/008
13628785 Bausch & Lomb Incorporated Smith Thomas
A method for modifying the refractive index of an optical, hydrogel polymeric material. The method comprises irradiating predetermined regions of an optical, polymeric material with a laser to form refractive structures. To facilitate the formation of the refractive structures the optical, hydrogel polymeric material comprises a photosensitizer. The presence of the photosensitizer permits one to set a scan rate to a value that is at least fifty times greater than a scan rate without the photosensitizer in the material, yet provides similar refractive structures in terms of the observed change in refractive index. Alternatively, the photosensitizer in the polymeric material permits one to set an average laser power to a value that is at least two times less than an average laser power without the photosensitizer in the material, yet provide similar refractive structures. The method can be used to form refractive structures in corneal inlays and intraocular lenses following the insertion of such optical devices in an eye of a patient.


4. US 20130226162 - Method for Modifying the Refractive Index of Ocular Tissues 29.08.2013
A61F 9/008
13789762 University of Rochester Knox Wayne H.
A laser system for changing the index of refraction of cornea tissue in a living eye. The laser system comprises a laser that provides laser pulses with a wavelength from 400 nm to 900 nm and a pulse energy from 0.01 nJ to 10 nJ, and a control device for setting the operating parameters of the laser below an optical breakdown threshold of the tissue to avoid photo-disruption and tissue destruction of the tissue, and to direct the laser pulses at the cornea tissue resulting in a change in the index of refraction of the tissue within regions irradiated by the laser pulses.


5. US 08512320 - Method for modifying the refractive index of ocular tissues 20.08.2013
A61B 18/18
13789755 University of Rochester Knox Wayne H.
The invention is directed to a method for correcting vision in a patient by modifying the refractive index of cornea tissue. The method comprises identifying and measuring the degree of vision correction of the patient; and determining the position and type of refractive structures to be written into the cornea tissue of the patient to correct the patient's vision. The refractive structures are written by irradiating select regions of the cornea tissue with focused laser pulses having a wavelength from 400 nm to 900 nm and a pulse energy from 0.01 nJ to 10 nJ. The refractive structures are characterized by a positive change in refractive index in relation to non-irradiated cornea tissue of the patient.


6. US 20130178934 - Optical Material and Method for Modifying the Refractive Index 11.07.2013
A61F 2/16
13782257 Bausch & Lomb Incorporated Knox Wayne H.
A laser system for modifying the index of refraction of an optical hydrogel material. The laser system comprises a computer program to determine the position and shape of refractive structures to be written into the optical hydrogel material to correct a patient's vision, and a focused laser that generates laser light having a wavelength of from 400 nm to 900 nm, and which operates with an average power of 10 mW to 1000 mW to produce a pulse energy from 0.05 nJ to 1000 nJ with a peak intensity at focus of greater than 1013 W/cm2. The refractive structures exhibit a change in the index of refraction of 0.01 to 0.06 in the optical hydrogel material.


7. US 20130138093 - OPTICAL MATERIAL AND METHOD FOR MODIFYING THE REFRACTIVE INDEX 30.05.2013
A61B 18/20
13686952 Knox Wayne H. Knox Wayne H.
An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.


8. US 20120310223 - METHOD FOR MODIFYING THE REFRACTIVE INDEX OF OCULAR TISSUES AND APPLICATIONS THEREOF 06.12.2012
A61F 9/01
13326403 Knox Wayne H. Knox Wayne H.
A method for modifying a refractive property of ocular tissue in an eye by creating at least one optically-modified gradient index (GRIN) layer in the corneal stroma and/or the crystalline by continuously scanning a continuous stream of laser pulses having a focal volume from a laser having a known average power along a continuous line having a smoothly changing refractive index within the tissue, and varying either or both of the scan speed and the laser average power during the scan. The method may further involve determining a desired vision correction adjustment, and determining a position, number, and design parameters of gradient index (GRIN) layers to be created within the ocular tissue to provide the desired vision correction.


9. US 20120310340 - Method for Modifying the Refractive Index of an Optical Material and Resulting Optical Vision Component 06.12.2012
A61F 2/16
13238143 Knox Wayne H. Knox Wayne H.
A method for modifying the refractive index of an optical polymeric material. The method comprises continuously irradiating predetermined regions of an optical, polymeric material with femtosecond laser pulses to form a gradient index refractive structure within the material. An optical device includes an optical, polymeric lens material having an anterior surface and posterior surface and an optical axis intersecting the surfaces and at least one laser-modified, GRIN layer disposed between the anterior surface and the posterior surface and arranged along a first axis 45° to 90° to the optical axis, and further characterized by a variation in index of refraction across at least one of at least a portion of the adjacent segments and along each segment.


10. WO WO/2012/166696 - METHOD FOR MODIFYING THE REFRACTIVE INDEX OF AN OPTICAL MATERIAL AND RESULTING OPTICAL VISION COMPONENT 06.12.2012
A61F 2/16
PCT/US2012/039807 BAUSCH & LOMB INCORPORATED SMITH, Thomas
A method for modifying the refractive index of an optical polymeric material. The method comprises continuously irradiating predetermined regions of an optical, polymeric material with femtosecond laser pulses to form a gradient index refractive structure within the material. An optical device includes an optical, polymeric lens material having an anterior surface and posterior surface and an optical axis intersecting the surfaces and at least one laser-modified, GRIN layer disposed between the anterior surface and the posterior surface and arranged along a first axis 45° to 90° to the optical axis and further characterized by a variation in index of refraction across at least one of at least a portion of the adjacent segments and along each segment.

11. ES 2379582 - Lente intraocular con fotosensibilizador y procedimiento para modificar el índice de refracción de la lente 27.04.2012
A61F 2/16
09751282 Bausch & Lomb Incorporated SMITH, Thomas

12. CN 102264304 - Photoacoustic imaging using versatile acoustic lens 30.11.2011
A61B 8/08
200980140749.3 Univ Rochester Dogra Vikram S
To image various soft tissues in the body using pulsed laser optical excitation delivered through a multi-mode optical fiber to create photoacoustic impulses, and then image the generated photoacoustic impulses with an acoustic detector array, a probe includes either a mirror and an acoustic lens or a special acoustic lens of variable focal length and magnification that can operate in a liquid environment that is aberration-corrected to a sufficient degree that high resolution images can be obtained with lateral as well as depth resolution.

13. EP 2337500 - PHOTOACOUSTIC IMAGING USING A VERSATILE ACOUSTIC LENS 29.06.2011
A61B 8/08
09821233 UNIV ROCHESTER DOGRA VIKRAM S
To image various soft tissues in the body using pulsed laser optical excitation delivered through a multi-mode optical fiber to create photoacoustic impulses, and then image the generated photoacoustic impulses with an acoustic detector array, a probe includes either a mirror and an acoustic lens or a special acoustic lens of variable focal length and magnification that can operate in a liquid environment that is aberration-corrected to a sufficient degree that high resolution images can be obtained with lateral as well as depth resolution.

14. EP 2326285 - INTRAOCULAR LENS WITH PHOTOSENSITIZER AND METHOD FOR MODIFYING THE REFRACTIVE INDEX OF THE LENS 01.06.2011
A61F 2/16
09751282 BAUSCH & LOMB SMITH THOMAS
An intraocular lens comprising an optical, polymeric material with predetermine regions that have been irradiated with light from a laser to form refractive structures. The refractive structures are characterized by a change in refractive index within the irradiated regions of the lens with little or no scattering loss. To facilitate the formation of the refractive structures the optical, polymeric material is prepared from at least one monomer having a photofunctional group, the monomer having a two-photon cross- section of at least 10 GM. The invention is also directed to a method for modifying the refractive index of an intraocular lens prior to the surgical insertion of the lens in a human eye. The described irradiation process is used in a manufacturing environment to create refractive structures in the intraocular lens. The method includes irradiating a solvated intraocular lens at predetermined regions with light from a laser to form refractive structures.

15. CN 102065795 - Intraocular lens with photosensitizer and method for modifying the refractive index of the lens 18.05.2011
A61F 2/16
200980118220.1 Bausch & Lomb Smith Thomas
An intraocular lens comprises an optical, polymeric material with predetermine regions that have been irradiated with light from a laser to form refractive structures. The refractive structures are characterized by a change in refractive index within the irradiated regions of the lens with little or no scattering loss. To facilitate the formation of the refractive structures the optical, polymeric material is prepared from at least one monomer having a photofunctional group, the monomer having a two-photon cross- section of at least 10 GM. The invention is also directed to a method for modifying the refractive index of an intraocular lens prior to the surgical insertion of the lens in a human eye. The described irradiation process is used in a manufacturing environment to create refractive structures in the intraocular lens. The method includes irradiating a solvated intraocular lens at predetermined regions with light from a laser to form refractive structures.

16. US 20110071509 - METHOD FOR MODIFYING THE REFRACTIVE INDEX OF OCULAR TISSUES 24.03.2011
A61F 9/01
12895978 UNIVERSITY OF ROCHESTER Knox Wayne H.
A method for providing vision correction to a patient. The method includes: (a) measuring the degree of vision correction needed by the patient and determining the location and shape of refractive structures that need to be positioned within the cornea to partially correct a patient's vision; (b) directing and focusing femtosecond laser pulses in the blue spectral region within the cornea at an intensity high enough to change the refractive index of the cornea within a focal region, but not high enough to damage the cornea or to affect cornea tissue outside of the focal region; and (c) scanning the laser pulses across a volume of the cornea or the lens to provide the focal region with refractive structures in the cornea or the lens. Again, the refractive structures are characterized by a change in refractive index, and exhibit little or no scattering loss.


17. US 20100298688 - PHOTOACOUSTIC IMAGING USING A VERSATILE ACOUSTIC LENS 25.11.2010
A61B 5/05
12579741 DOGRA VIKRAM S DOGRA Vikram S.
To image various soft tissues in the body using pulsed laser optical excitation delivered through a multi-mode optical fiber to create photoacoustic impulses, and then image the generated photoacoustic impulses with an acoustic detector array, a probe includes either a mirror and an acoustic lens or a special acoustic lens of variable focal length and magnification that can operate in a liquid environment that is aberration-corrected to a sufficient degree that high resolution images can be obtained with lateral as well as depth resolution.


18. US 20100298933 - Optical material and method for modifying the refractive index 25.11.2010
A61F 2/16
12846950 Bausch & Lomb Incorporated Knox Wayne H.
The invention is directed to an optical device comprising refractive optical structures, wherein the refractive structures are characterized by a change in refractive index, exhibit little or no scattering loss, and exhibit no significant differences in the Raman spectrum with respect to the non-irradiated optical, polymeric material.


19. WO WO/2010/045421 - PHOTOACOUSTIC IMAGING USING A VERSATILE ACOUSTIC LENS 22.04.2010
A61B 8/08
PCT/US2009/060774 UNIVERSITY OF ROCHESTER DOGRA, Vikram S.
To image various soft tissues in the body using pulsed laser optical excitation delivered through a multi-mode optical fiber to create photoacoustic impulses, and then image the generated photoacoustic impulses with an acoustic detector array, a probe includes either a mirror and an acoustic lens or a special acoustic lens of variable focal length and magnification that can operate in a liquid environment that is aberration-corrected to a sufficient degree that high resolution images can be obtained with lateral as well as depth resolution.

20. WO WO/2009/143054 - INTRAOCULAR LENS WITH PHOTOSENSITIZER AND METHOD FOR MODIFYING THE REFRACTIVE INDEX OF THE LENS 26.11.2009
A61F 2/16
PCT/US2009/044335 BAUSCH & LOMB INCORPORATED SMITH, Thomas
An intraocular lens comprising an optical, polymeric material with predetermine regions that have been irradiated with light from a laser to form refractive structures. The refractive structures are characterized by a change in refractive index within the irradiated regions of the lens with little or no scattering loss. To facilitate the formation of the refractive structures the optical, polymeric material is prepared from at least one monomer having a photofunctional group, the monomer having a two-photon cross- section of at least 10 GM. The invention is also directed to a method for modifying the refractive index of an intraocular lens prior to the surgical insertion of the lens in a human eye. The described irradiation process is used in a manufacturing environment to create refractive structures in the intraocular lens. The method includes irradiating a solvated intraocular lens at predetermined regions with light from a laser to form refractive structures.

21. CA 2724960 - INTRAOCULAR LENS WITH PHOTOSENSITIZER AND METHOD FOR MODIFYING THE REFRACTIVE INDEX OF THE LENS 26.11.2009
A61F 2/16
2724960 BAUSCH & LOMB INCORPORATED SMITH, THOMAS
An intraocular lens comprising an optical, polymeric material with predetermine regions that have been irradiated with light from a laser to form refractive structures. The refractive structures are characterized by a change in refractive index within the irradiated regions of the lens with little or no scattering loss. To facilitate the formation of the refractive structures the optical, polymeric material is prepared from at least one monomer having a photofunctional group, the monomer having a two- photon cross- section of at least 10 GM. The invention is also directed to a method for modifying the refractive index of an intraocular lens prior to the surgical insertion of the lens in a human eye. The described irradiation process is used in a manufacturing environment to create refractive structures in the intraocular lens. The method includes irradiating a solvated intraocular lens at predetermined regions with light from a laser to form refractive structures.


22. US 20090287306 - Optical hydrogel material with photosensitizer and method for modifying the refractive index 19.11.2009
A61F 2/16
12380892 SMITH THOMAS Smith Thomas
A method for modifying the refractive index of an optical, hydrogel polymeric material. The method comprises irradiating predetermined regions of an optical, polymeric material with a laser to form refractive structures. To facilitate the formation of the refractive structures the optical, hydrogel polymeric material comprises a photosensitizer. The presence of the photosensitizer permits one to set a scan rate to a value that is at least fifty times greater than a scan rate without the photosensitizer in the material, yet provides similar refractive structures in terms of the observed change in refractive index. Alternatively, the photosensitizer in the polymeric material permits one to set an average laser power to a value that is at least two times less than an average laser power without the photosensitizer in the material, yet provide similar refractive structures.


23. CN 101489509 - Optical material and method for modifying the refractive index 22.07.2009
A61F 9/008
200780024664.X Bausch & Lomb Knox Wayne H.
The invention relates to a method for modifying the refractive index of an optical, polymeric material. The method comprises irradiating select regions of the optical, polymeric material with a focused, visible or near-IR laser having a pulse energy from 0.05 nJ to 1000 nJ. The irradiation results in the formation of refractive optical structures, which exhibit little or no scattering loss. The method can be used to modify the refractive index of an intraocular lens following the surgical implantation of the intraocular lens in a human eye. The invention is also directed to an optical device comprising refractive optical structures, which exhibit little or no scattering loss and are characterized by a positive change in refractive index.

24. US 20090143858 - Optical material and method for modifying the refractive index 04.06.2009
A61F 2/16
11948298 Bausch &; Lomb Incorporated Knox Wayne H.
A method for modifying the refractive index of an optical, polymeric material. The method comprises irradiating select regions of the optical, polymeric material with a focused, visible or near-IR laser having a pulse energy from 0.05 nJ to 1000 nJ. The irradiation results in the formation of refractive optical structures, characterized by a change in refractive index, exhibit little or no scattering loss, and exhibit no significant differences in the Raman spectrum with respect to the non-irradiated optical, polymeric material. The method can be used to modify the refractive index of an intraocular lens following the surgical implantation of the intraocular lens in a human eye. The invention is also directed to an optical device comprising refractive optical structures, wherein the refractive structures are characterized by a change in refractive index, exhibit little or no scattering loss, and exhibit no significant differences in the Raman spectrum with respect to the non-irradiated optical, polymeric material.


25. WO WO/2009/070438 - OPTICAL MATERIAL AND METHOD FOR MODIFYING THE REFRACTIVE INDEX 04.06.2009
A61F 2/16
PCT/US2008/083076 BAUSCH & LOMB INCORPORATED KNOX, Wayne, H.
A method for modifying the refractive index of an optical, hydrated polymeric material. The method comprises irradiating select regions of the optical, polymeric material with a visible or near- IR laser having a pulse energy from 0.05 nJ to 1000 nJ. The irradiation results in the formation of refractive optical structures, characterized by a change in refractive index, exhibit little or no scattering loss, and exhibit no significant differences in the Raman spectrum with respect to the non- irradiated optical, polymeric material. The method can be used to modify the refractive index of an intraocular lens following the surgical implantation of the intraocular lens in a human eye. The invention is also directed to an optical device comprising refractive optical structures, wherein the refractive structures are characterized by a change in refractive index, exhibit little or no scattering loss, and exhibit no significant differences in the Raman spectrum with respect to the non-irradiated optical, polymeric material.

26. EP 2032102 - OPTICAL MATERIAL AND METHOD FOR MODIFYING THE REFRACTIVE INDEX 11.03.2009
A61F 9/008
07798742 BAUSCH & LOMB KNOX WAYNE H
A method for modifying the refractive index of an optical, polymeric material. The method comprises irradiating select regions of the optical, polymeric material with a focused, visible or near-IR laser having a pulse energy from 0.05 nJ to 1000 nJ. The irradiation results in the formation of refractive optical structures, which exhibit little or no scattering loss. The method can be used to modify the refractive index of an intraocular lens following the surgical implantation of the intraocular lens in a human eye. The invention is also directed to an optical device comprising refractive optical structures, which exhibit little or no scattering loss and are characterized by a positive change in refractive index.

27. KR 1020090024197 - OPTICAL MATERIAL AND METHOD FOR MODIFYING THE REFRACTIVE INDEX 06.03.2009
A61F 2/16
1020087031661 BAUSCH&LOMB INCORPORATED KNOX WAYNE H.
A method for modifying the refractive index of an optical, polymeric material. The method comprises irradiating select regions of the optical, polymeric material with a focused, visible or near-IR laser having a pulse energy from 0.05 nJ to 1000 nJ. The irradiation results in the formation of refractive optical structures, which exhibit little or no scattering loss. The method can be used to modify the refractive index of an intraocular lens following the surgical implantation of the intraocular lens in a human eye. The invention is also directed to an optical device comprising refractive optical structures, which exhibit little or no scattering loss and are characterized by a positive change in refractive index. ©KIPO&WIPO 2009

28. US 20090005764 - Method for modifying the refractive index of ocular tissues 01.01.2009
A61B 18/18
12146976 Knox Wayne H. Knox Wayne H.
A method for modifying the refractive index of ocular tissues. The method comprises irradiating select regions of ocular tissue with a visible or near-IR laser. The irradiation results in the formation of structures in the ocular tissue, characterized by a change in refractive index, and which exhibit little or no scattering loss.


29. WO WO/2009/003107 - METHOD FOR MODIFYING THE REFRACTIVE INDEX OF OCULAR TISSUES 31.12.2008
A61F 9/008
PCT/US2008/068356 BAUSCH & LOMB INCORPORATED KNOX, Wayne, H.
A method for modifying the refractive index of ocular tissues. The method comprises irradiating select regions of ocular tissue with a visible or near-IR laser. The irradiation results in the formation of structures in the ocular tissue, characterized by a change in refractive index, and which exhibit little or no scattering loss.

30. US 20080001320 - Optical Material and Method for Modifying the Refractive Index 03.01.2008
A61F 2/16
11745746 KNOX WAYNE H Knox Wayne H.
A method for modifying the refractive index of an optical, polymeric material. The method comprises irradiating select regions of the optical, polymeric material with a focused, visible or near-IR laser having a pulse energy from 0.05 nJ to 1000 nJ. The irradiation results in the formation of refractive optical structures, which exhibit little or no scattering loss. The method can be used to modify the refractive index of an intraocular lens following the surgical implantation of the intraocular lens in a human eye. The invention is also directed to an optical device comprising refractive optical structures, which exhibit little or no scattering loss and are characterized by a positive change in refractive index.


31. WO WO/2008/002796 - OPTICAL MATERIAL AND METHOD FOR MODIFYING THE REFRACTIVE INDEX 03.01.2008
A61F 9/008
PCT/US2007/071538 BAUSCH & LOMB INCORPORATED KNOX, Wayne, H.
A method for modifying the refractive index of an optical, polymeric material. The method comprises irradiating select regions of the optical, polymeric material with a focused, visible or near-IR laser having a pulse energy from 0.05 nJ to 1000 nJ. The irradiation results in the formation of refractive optical structures, which exhibit little or no scattering loss. The method can be used to modify the refractive index of an intraocular lens following the surgical implantation of the intraocular lens in a human eye. The invention is also directed to an optical device comprising refractive optical structures, which exhibit little or no scattering loss and are characterized by a positive change in refractive index.

32. CA 2655229 - OPTICAL MATERIAL AND METHOD FOR MODIFYING THE REFRACTIVE INDEX 03.01.2008
A61F 9/008
2655229 BAUSCH & LOMB INCORPORATED KNOX, WAYNE H.
A method for modifying the refractive index of an optical, polymeric material. The method comprises irradiating select regions of the optical, polymeric material with a focused, visible or near-IR laser having a pulse energy from 0.05 nJ to 1000 nJ. The irradiation results in the formation of refractive optical structures, which exhibit little or no scattering loss. The method can be used to modify the refractive index of an intraocular lens following the surgical implantation of the intraocular lens in a human eye. The invention is also directed to an optical device comprising refractive optical structures, which exhibit little or no scattering loss and are characterized by a positive change in refractive index.


33. US 20060159398 - Method and optical fiber device for production of low noise continuum 20.07.2006
G02B 6/00
11300593 University of Rochester Knox Wayne H.
A waveguide, such as a holey fiber or other optical fiber, is tapered to control the dispersion in a manner which varies along the length of the tapered portion of the fiber, thus providing the desired characteristics of the fiber. The longitudinal variation of the phase-matching conditions for Cherenkov radiation (CR) and four-wave mixing (FWM) introduced by DMM allow the generation of low-noise supercontinuum. The flexibility of the design permits the designer to control the tapering to select the bandwidth, the center frequency, or both. The holey fiber can be a polarization-maintaining fiber.


34. WO WO/2006/066093 - METHOD AND OPTICAL FIBER DEVICE FOR PRODUCTION OF LOW-NOISE CONTINUUM 22.06.2006
G02B 6/02
PCT/US2005/045631 UNIVERSITY OF ROCHESTER KNOX, Wayne, H.
A waveguide, such as a holey fiber or other optical fiber, is tapered to control the dispersion in a manner which varies along the length of the tapered portion of the fiber, thus providing the desired characteristics of the fiber. The longitudinal variation of the phase-matching conditions for Cherenkov radiation (CR) and four-wave mixing (FWM) introduced by DMM allow the generation of low-noise supercontinuum. The flexibility of the design permits the designer to control the tapering to select the bandwidth, the center frequency, or both. The holey fiber can be a polarization-maintaining fiber.

35. WO WO/2005/043200 - FIBER DEVICE WITH HIGH NONLINEARITY, DISPERSION CONTROL AND GAIN 12.05.2005
G02B 6/26
PCT/US2004/036353 UNIVERSITY OF ROCHESTER KNOX, Wayne, H.
An optical fiber is tapered, for example, by heating it with a CO2 laser. The tapering process is controlled such that the taper transition regions have taper angles selected to minimize loss. The taper waist has a diameter selected to introduce desired dispersion properties and desired nonlinearity. The optical fiber can be used as a dispersion compensator in a fiber laser or other fiber optic system. The nonlinearity in the tapered optical fiber allows the generation of ultrashort light pulses.

36. US 20050094941 - Fiber device with high nonlinearity, dispersion control and gain 05.05.2005
G02B 6/26
10978357 University of Rochester Knox Wayne H.
An optical fiber is tapered, for example, by heating it with a CO2 laser. The tapering process is controlled such that the taper transition regions have taper angles selected to minimize loss. The taper waist has a diameter selected to introduce desired dispersion properties and desired nonlinearity. The optical fiber can be used as a dispersion compensator in a fiber laser or other fiber optic system. The nonlinearity in the tapered optical fiber allows the generation of ultrashort light pulses.


37. US 20040151495 - Dynamic measurement of and compensation for impairments to optical data communication pulses using photon-counting silicon avalanche photodiode 05.08.2004
H04B 10/08
10099180 Lucent Technologies Inc. Knox Wayne Harvey
Apparatus and method is described for using a silicon photon-counting avalanche photodiode (APD) to detect at least two-photon absorption (TPA) of an optical signal, the optical signal having a wavelength range extending from 1.2 μm to an upper wavelength region that increases as the number of photons simultaneously absorbed by the APD increases beyond two. In one embodiment, the TPA count is used by a signal compensation apparatus to reduce dispersion of a received optical pulse communication signal subjected to group velocity dispersion, polarization mode dispersion, or other signal impairment phenomena which effect the TPA count. Another embodiment, the TPA count is used to determine the optical signal-to-noise ratio of a received optical pulse communication signal. Another embodiment uses the TPA count to determine the autocorrelation between a first and second optical pulse signals as a function of the relative delay between the first and second optical pulse signals. Another embodiment uses the TPA count to achieve synchronization of a second optical pulse signal to a first optical pulse signal.


38. US 20040097236 - Mobile wireless network and method 20.05.2004
H04M 1/00
10300943 Knox Wayne Harvey
A communication architecture switch and method which provide a switch capable of connecting a mobile terminal to one router port of a plurality of router ports substantially independent of a connection path between the mobile terminal and the one router port for a session duration. The connection to the same router port for the duration of a session allows the router to operate as if the mobile terminal had a unique address instead of being a mobile terminal with a variable address. This simplifies the router and other network layer element as the need for a Mobile IP Protocol at the network level is obviated.


39. US 6597481 - Controllable wavelength-selective optical cross-connect 22.07.2003
H04J 14/02
09271642 Lucent Technologies Inc. Fatehi, Mohammed Taghi
In accordance with the invention, an optical cross-connect switch includes an optical router for distributing multi-wavelength optical input signals, an optical combiner for supplying multi-wavelength signals at the output ports of the switch, and optical fibers for interconnecting the optical router and optical combiner. Selected interconnecting optical fibers include controllable wavelength-selective elements, such as magnetically controllable fiber gratings, which are capable of transmitting or reflecting individual channels within the multi-wavelength optical signals so that a selected channel of a particular wavelength can be routed from any of the input ports to any of the output ports of the switch.


40. US 6567195 - Optical network using remote optical powering of optoelectronic switch 20.05.2003
H04B 10/24
09335334 Lucent Technologies Inc. Ford, Joseph Earl
An optical local area network uses modified remote network interface cards (NICs) to provide an optical carrier signal for signaling use by a centralized optoelectronic switch unit. The NIC optical transceiver is modified so that instead of being normally “off” during the standby mode, the data signal is logically inverted to be “on.” Light from each NIC is used to provide optical power for a corresponding optical modulator on the switch unit.


41. JP 2003032194 - PERFORMANCE MONITORING METHOD IN OPTICAL COMMUNICATION SYSTEM 31.01.2003
G02F 3/0
2002148471 LUCENT TECHNOL INC DINU MIHAELA
PROBLEM TO BE SOLVED: To provide an optical performance monitor(OPM) that is used in an optical network.
SOLUTION: The optical performance monitor has an optical autocorrelator configured to sample the autocorrelation function of the optical signal, e.g. using two-photon absorption. Autocorrelation points at various bit delays independently or in combination with average optical power may be used to detect and/or quantify one or more of the following: loss of data modulation, signal contrast, pulse broadening, peak power fluctuations, timing jitter, and deviations from the pseudo-random character of data. In addition, the OPM may be configured to perform Fourier transformation based on the autocorrelation points to obtain corresponding spectral components. The spectral components may be used to detect and/or quantify one or more of chromatic dispersion, polarization mode dispersion, and misalignment of a pulse carver and data modulator.
COPYRIGHT: (C)2003,JPO


42. US 20020176129 - Performance monitoring in an optical communication system 28.11.2002
G02F 3/00
10109623 Lucent Technologies Inc. Dinu Mihaela
An optical performance monitor (OPM), e.g., for use in an optical network. The OPM may be configured to characterize one or more impairments in an optical signal modulated with data. The OPM has an optical autocorrelator configured to sample the autocorrelation function of the optical signal, e.g., using two-photon absorption. Autocorrelation points at various bit delays independently or in combination with average optical power may be used to detect and/or quantify one or more of the following: loss of data modulation, signal contrast, pulse broadening, peak power fluctuations, timing jitter, and deviations from the pseudo-random character of data. In addition, the OPM may be configured to perform Fourier transformation based on the autocorrelation points to obtain corresponding spectral components. The spectral components may be used to detect and/or quantify one or more of chromatic dispersion, polarization mode dispersion, and misalignment of a pulse carver and data modulator. The OPM may be further configured to generate feedback, e.g., to network operators to improve network performance.


43. CA 2381682 - PERFORMANCE MONITORING IN AN OPTICAL COMMUNICATION SYSTEM 23.11.2002
H04B 10/08
2381682 LUCENT TECHNOLOGIES INC. DINU, MIHAELA
An optical performance monitor (OPM), e.g., for use in an optical network. The OPM may be configured to characterize one or more impairments in an optical signal modulated with data. The OPM has an optical autocorrelator configured to sample the autocorrelation function of the optical signal, e.g., using two-photon absorption. Autocorrelation points at various bit delays independently or in combination with average optical power may be used to detect and/or quantify one or more of the following: loss of data modulation, signal contrast, pulse broadening, peak power fluctuations, timing jitter, and deviations from the pseudo-random character of data. In addition, the OPM may be configured to perform Fourier transformation based on the autocorrelation points to obtain corresponding spectral components. The spectral components may be used to detect and/or quantify one or more of chromatic dispersion, polarization mode dispersion, and misalignment of a pulse carver and data modulator. The OPM may be further configured to generate feedback, e.g., to network operators to improve network performance.


44. JP 2002270929 - DIGITAL ALLOY MODULATION FOR MANUFACTURING SATURABLE ABSORBER MIRROR 20.09.2002
H01S 3/98
2001053928 LUCENT TECHNOL INC KRAUSZ FERENC
PROBLEM TO BE SOLVED: To provide an improved technique for obtaining the delay characteristics of semiconductor layers in a multilayered stack by achieving desirable changes in optical thickness and composition.
SOLUTION: A saturable absorber mirror which is used at the time of locking the mode of a laser uses the multilayered stack of compound semiconductor layers which is arranged under a multilayered stack of dielectric layers forming a smooth edge filter and alternately contains narrow and broad energy band gaps. The narrow energy band gap layers are alloy-modulated in a digital mode and the energy band gaps of the layers are changed so that the mirror offers a desired group-delay dispersing characteristic.
COPYRIGHT: (C)2002,JPO


45. US 6400165 - Ultra-fast probe 04.06.2002
G01R 31/302
09496985 Lucent Technologies Inc. Knox, Wayne Harvey
An electrooptic probe for measuring the voltage at regions of an ultra fast device under test includes a standard gallium arsenide substrate that includes on a front surface a film of LT GaAs whose surface includes a conductive stripe that includes first and second portions separated by a gap, the first portion for contacting the region under test, and the second portion for connection to a measuring instrument. The probe is irradiated with a pulsed beam of light, advantageously from a mode-locked femtosecond laser focused at the gap in the stripe and of appropriate two photons, for making conducting by two-photon absorption the region of the film underlying the gap. Preferably the beam irradiates the back surface of the probe to pass through its substrate to reach the gap. Alternatively the beam can irradiate the back surface of the device under test to reach the gap.


46. US 6392769 - Automatic level control circuit for optical system 21.05.2002
H04B 10/08
09272976 Lucent Technologies Inc. Ford, Joseph Earl
Feedback instabilities arising from interactions between automatic control loops at the amplifier nodes of an optical network are eliminated by restricting operation to a single amplifier node at a time. Amplifier node activation is accomplished using a global control signal which is sequentially passed from an upstream node through all of the nodes of the system. By controlling the state of the global control signal, an upstream node has operational priority over downstream nodes.


47. US 6388803 - Article comprising a broad band optical amplifier 14.05.2002
H01S 3/00
09517342 Agere Systems Guardian Corp. Knox, Wayne H.
A broad band optical amplifier includes at least one free space wavelength demultiplexer/multiplexer and optical gain means. The free space demultiplexer/multiplexer receives a multiplexed signal and spatially separates it into a plurality of spectral components each having a unique peak wavelength. The optical gain means has a plurality of wavelength-selective gain regions that are capable of imparting gain to (i.e., amplifying) an optical signal over a particular narrow range of wavelengths. The operational range (i.e., the particular narrow range of wavelengths) of each gain region is unique. The spatially-separated spectral components are individually delivered to specific gain regions by the demultiplexer/multiplexer as a function of the peak wavelength of the spectral component and the operative range of the gain region.


48. JP 2001284690 - OPTICAL COMMUNICATION NETWORK HAVING WIDEBAND OPTICAL AMPLIFIER 12.10.2001
G02B 6/293
2001057523 LUCENT TECHNOL INC KNOX WAYNE HARVEY
PROBLEM TO BE SOLVED: To provide a wideband optical amplifier and an optical communication network having the amplifier capable of transmitting spectral components to a gain region of a 'corresponding' specific wavelength as a function of its wavelength.
SOLUTION: The wideband optical amplifier comprises at least one automatic free-space wavelength demultiplexer/multiplexer and an optical gain means. In this case, the free-space wavelength demultiplexer/multiplexer receives a multiplexed signal, and spatially separates the signal into a plurality of spectral components each having a unique peak wavelength. The gain means has a plurality of wavelength selective gain region capable of distributing a gain to the optical signal in a specific wavelength of the narrow range, (i.e., amplifying the optical signal). An operating range of each gain region, (i.e., a narrow range of the specific wavelength) is unique. The spatially separated spectral components are individually transmitted to the specific gain region by the demultiplexer/multiplexer as functions of the peak wavelength of the component and an operable range of the gain region.
COPYRIGHT: (C)2001,JPO


49. JP 2001244552 - OPTICAL DEVICE 07.09.2001
H01S 5/65
2001046368 LUCENT TECHNOL INC KRAUSZ FERENC
PROBLEM TO BE SOLVED: To realize a wide-band saturable Bragg reflector suitable for using on the occasion of mode-locking a laser, to provide a pulse not longer than 10 femtoseconds, or pulse tunable over a wide wavelength band and comparatively long.
SOLUTION: A saturable Bragg reflector 10 has monolithic integrated multilayer stack having three sections favorably. The first section 12 functions as an appropriate board for indicating the other sections. The second section 14 has a plurality of semiconductor layers composed by arranging materials having relatively high refractive indexes such as AlxGa1-xAs, and materials having relatively low refractive indexes such as AlAs alternately. These layers are grown epitaxially on a board, and their thicknesses and values of X change along the board. Generally, these layers increase in thickness and their x values decrease with their distance from the uppermost part of the stack.
COPYRIGHT: (C)2001,JPO


50. EP 1130703 - Hybrid semiconductor-dielectric chirped saturable absorber mirror 05.09.2001
G02B 5/18
01301607 TRIQUINT TECHNOLOGY HOLDING CO KNOX WAYNE HARVEY
High reflectance, saturable absorption and prescribed group delay dispersion (GDD) are provided over a broad bandwidth by a hybrid structure 10 consisting of a multilayer semiconductive stack 11 and a multilayer dielectric stack 12. Both the semiconductive layers and the dielectric layers vary in thickness and the layer thickness modulation is used to provide a desired dispersion and bandwidth. Additionally, the index of refraction of the semiconductive layers is varied along the stack similarly to control the bandwidth and dispersion. The reflector is used as a Q-switch to mode lock or Q-switch a laser.

51. EP 1130826 - Broad band optical amplifier using free space demultiplexing 05.09.2001
H01S 5/00
01301910 AGERE SYST OPTOELECTRONICS KNOX WAYNE HARVEY
A broad band optical amplifier (212) includes at least one free space wavelength demultiplexer/multiplexer (214) and optical gain means (222). The free space demultiplexer/multiplexer (214) receives a multiplexed signal (m- lambda ) and spatially separates it into a plurality of spectral components ( lambda -i) each having a unique peak wavelength. The optical gain means (222) has a plurality of wavelength-selective gain regions (224) that are capable of imparting gain to (i.e., amplifying) an optical signal over a particular narrow range of wavelengths. The operational range (i.e., the particular narrow range of wavelengths) of each gain region (224) is unique. The spatially-separated spectral components are individually delivered to specific gain regions by the demultiplexer/multiplexer as a function of the peak wavelength of the spectral component and the operative range of the gain region.

52. US 6259719 - Saturable bragg reflectors for use in mode-locking lasers 10.07.2001
H01S 3/113
09358112 Lucent Technologies Cunningham, John E.
A saturable Bragg reflector for use in mode locking a laser comprises a stack alternately of layers of a high index of refraction and layers of a low index of refraction. The layers of high index all have optical thicknesses of about one quarter the operating wavelength of the laser. The layers of low index, except for the pair of uppermost layers, have optical thicknesses of a quarter the operating wavelength but that pair have a thickness of about one eighth of a wavelength. A quantum well is located near the center of the layer of high index between the pair of one eighth wavelength. Such a reflector is used as one end of a resonant cavity that houses a gain medium.


53. JP 2001112034 - CROSS CONNECTION EXCHANGE AND ITS REALIZING METHOD 20.04.2001
H04B 10/2
2000239400 LUCENT TECHNOL INC FATEHI MOHAMMAD T
PROBLEM TO BE SOLVED: To provide a method for realizing an optical cross connection exchange that can switch optical signals relating to many optical channels and requires only a few wavelength selection elements to each passing signal path and to provide an exchange.
SOLUTION: The number of the wavelength selection elements having been required for signal paths of a conventional optical cross connection exchange is considerably reduced in the new optical cross connection exchange of this invention. A single optical channel distributor or more distributors accept wavelength multiplex optical signal as an input. Each signal includes channels, each of which is related to a single wavelength or more. Each distributor is distributed to any of a plurality of wavelength selection cross connectors arranged to receive each channel of the related wavelength multiplex input signal from the single or a plurality of distributors relating to a unique subset among a plurality of wavelengths.
COPYRIGHT: (C)2001,JPO


54. JP 2001068771 - SATURABLE BRAGG REFLECTOR USED FOR MODE-LOCKED LASER 16.03.2001
G02F 1/17
2000220482 LUCENT TECHNOL INC CUNNINGHAM JOHN E
PROBLEM TO BE SOLVED: To introduce a quantum well absorbing layer into a saturable Bragg reflector used in a mode-locked laser, by locating a quantum well within high refractive index layers having an optical thickness equal to a predetermined value of an operating wavelength, and sandwiching each high refractive index layer between low refractive index layers having a predetermined value of the operating wavelength.
SOLUTION: The saturable Bragg reflector 20 has a single crystal GaAs substrate, with low refractive index layers 22 and high refractive index layers 24 epitaxially grown thereon alternately. Each layer 22 has an optical thickness equal to 1/4 of an operating wavelength, and each layer 24 excluding the two uppermost ones 26A and 26B has an optical thickness equal to 1/4 of the operating wavelength. The layers 26A and 26B have an optical thickness equal to 1/8 of the operating wavelength. Further, a quantum well 28 is a layer having a thickness of about 100 made of a low refractive index material, and is located near the center of the GaAs layers 26A and 26B.
COPYRIGHT: (C)2001,JPO


55. US 6192172 - Optical wavelength-space cross-connect switch architecture 20.02.2001
G02B 6/26
09370824 Lucent Technologies Inc. Fatehi, Mohammad Taghi
A multi-wavelength optical cross-connect switch architecture incorporates a plurality of wavelength-selective optical cross-connect (WSXC) switch fabrics that receive multi-wavelength input signals distributed by one or more optical slicers and generate multi-wavelength output signals that are combined by a plurality of optical combiners. The WSXC fabrics employ fiber Bragg gratings (FBGs) as wavelength-selective elements. Using this architecture, the number of multi-wavelength channels carried by each WSXC is reduced from the number of channels present in each multi-wavelength input signal. In addition, the wavelength spacing between adjacent channels carried by each WSXC is increased over the spacing between adjacent channels in each multi-wavelength input signal.


56. EP 1076469 - Optical wavelength-space cross connect switch architecture 14.02.2001
H04B 10/02
00306518 LUCENT TECHNOLOGIES INC FATEHI MOHAMMAD TAGHI
A multi-wavelength optical cross-connect switch architecture incorporates a plurality of wavelength-selective optical cross-connect (WSXC) switch fabrics that receive multi-wavelength input signals distributed by one or more optical slicers and generate multi-wavelength output signals that are combined by a plurality of optical combiners. The WSXC fabrics employ fiber Bragg gratings (FBGs) as wavelength-selective elements. Using this architecture, the number of multi-wavelength channels carried by each WSXC is reduced from the number of channels present in each multi-wavelength input signal. In addition, the wavelength spacing between adjacent channels carried by each WSXC is increased over the spacing between adjacent channels in each multi-wavelength input signal.

57. CA 2314853 - OPTICAL WAVELENGTH-SPACE CROSS-CONNECT SWITCH ARCHITECTURE 09.02.2001
H04Q 3/52
2314853 LUCENT TECHNOLOGIES INC. FATEHI, MOHAMMAD
A multi-wavelength optical cross-connect switch architecture incorporates a plurality of wavelength-selective optical cross-connect (WSXC) switch fabrics that receive multi-wavelength input signals distributed by one or more optical slicers and generate multi wavelength output signals that are combined by a plurality of optical combiners. The WSXC fabrics employ fiber Bragg gratings (FBGs) as wavelength-selective elements. Using this architecture, the number of multi-wavelength channels carried by each WSXC is reduced from the number of channels present in each multi-wavelength input signal. In addition, the wavelength spacing between adjacent channels carried by each WSXC is increased over the spacing between adjacent channels in each multi-wavelength input signal.


58. EP 1071179 - Saturable Bragg reflectors and their use in mode-locked lasers 24.01.2001
G02F 1/35
00305863 AGERE SYST OPTOELECTRONICS CUNNINGHAM JOHN E
A saturable Bragg reflector for use in mode locking a laser comprises a stack alternately of layers of a high index of refraction and layers of a low index of refraction. The layers of high index all have optical thicknesses of about one quarter the operating wavelength of the laser. The layers of low index, except for the pair of uppermost layers, have optical thicknesses of a quarter the operating wavelength but that pair have a thickness of about one eighth of a wavelength. A quantum well is located near the center of the layer of high index between the pair of one eighth wavelength. Such a reflector is used as one end of a resonant cavity that houses a gain medium.

59. US 6151144 - Wavelength division multiplexing for unbundling downstream fiber-to-the-home 21.11.2000
H04J 14/02
09009439 Lucent Technologies, Inc. Knox Wayne H.
The passive optical network system and method for providing a predetermined wavelength of data to remote users according to the present invention includes a multiple wavelength transmitter for transmitting a multiwavelength signal. The multiwavelength signal includes a plurality of signal components of predetermined wavelengths provided by a plurality of access providers. Each access provider provides a signal component of wavelength different from that of the other access providers. A power-splitting passive optical network receives and power-splits the multiwavelength signal into a plurality of distributed multiwavelength signals each associated with a respective remote user. A filter selectively filters out, for each remote user, ones of the signal components of the associated distributed multiwavelength signal to provide the remote user with a selected one signal component of predetermined wavelength.


60. US 6144472 - Upgrading a power-splitting passive optical network using optical filtering 07.11.2000
H04J 14/02
09009434 Lucent Technologies Inc. Knox Wayne H.
The passive optical network system and method for providing a predetermined wavelength of data to remote users according to the present invention includes a multiple wavelength transmitter for transmitting a multiwavelength signal. The multiwavelength signal is provided by an access provider and has a plurality of signal components each of predetermined wavelength. A power-splitting passive optical network receives and power-splits the multiwavelength signal into a plurality of distributed multiwavelength signals each associated with a respective remote user. A filter selectively filters out, for each remote user, ones of the signal components of the associated distributed multiwavelength signal to provide the remote user with a selected one signal component of predetermined wavelength.


61. US 6141359 - Modelocking laser including self-tuning intensity-dependent reflector for self-starting and stable operation 31.10.2000
H01S 3/113
09016622 Lucent Technologies, Inc. Cunningham John Edward
The present invention is an improved modelocked laser comprising an optical gain medium and an optical cavity including a self-tuning saturable reflector incorporating one or more quantum wells. In the improved laser, the self-tuning saturable reflector comprises a first Bragg grating having a reflection spectrum broader than the spectrum of desired lasing and an additional Bragg reflector for light in the spectral region of lasing to provide self-starting and stable operation without mechanical tuning. The Bragg reflectors are preferably semiconductor quarter wave reflector stacks, and the saturable absorber is one or more quantum wells within the outer stack. The invention also encompasses the new saturable reflector used in such lasers.


62. US 6141127 - High capacity chirped-pulse wavelength-division multiplexed communication method and apparatus 31.10.2000
H04J 14/02
09027055 Lucent Technologies Inc. Boivin Luc
A high-capacity, chirped-pulse wavelength-division multiplexed communications apparatus and method in which a chirped-pulse, wavelength-division multiplexed signal is further optically multiplexed thereby enhancing bit rates per channel. A multifrequency optical source for supplying an optical signal having a number of wavelength division multiplexed (WDM) channels; a power splitter for splitting the optical signal from the multifrequency source into a number of signals; a number of time delay lines, for delaying each one of the signals independently; a number of data encoding modulators for modulating each one of the delayed signals; and a power combiner for combining the number of delayed, modulated signals into a single signal such that the multifrequency optical source signal is multiplexed by a desired amount.


63. JP 2000244953 - CONTROLLABLE WAVELENGTH SELECTING OPTICAL CROSS CONNECT 08.09.2000
H04B 10/2
2000040416 LUCENT TECHNOL INC FATEHI MOHAMMED T
PROBLEM TO BE SOLVED: To attain high speed operation or the like without requiring photoelectric conversion and optoelectronic conversion by allowing a controllable fiber diffraction grating to transmit or reflect an individual channel in a multi- wavelength optical signal so that a channel having prescribed wavelength and allowed to be selected is routed from either one of input ports of a switch to either one of output ports.
SOLUTION: An optical router part 150 in an optical switch 100 includes directional optical transfer devices 101, 102 and distributes multiwavelength input signals I1, I2. An optical combiner part 151 includes directional optical transfer devices 103, 104, combines a multiwavelength optical signal and outputs output signals O1, O2. The devices 103, 104 are respectively connected to output optical fibers 108, 109 to supply the output signals O1, O2. These devices 101 to 104 can directionally transfer or combine optical energy.
COPYRIGHT: (C)2000,JPO


64. EP 1031858 - Controllable wavelength-selective optical cross-connect 30.08.2000
G02B 6/34
00301030 LUCENT TECHNOLOGIES INC FATEHI MOHAMMED TAGHI
In accordance with the invention, an optical cross-connect switch includes an optical router for distributing multi-wavelength optical input signals, an optical combiner for supplying multi-wavelength signals at the output ports of the switch, and optical fibers for interconnecting the optical router and optical combiner. Selected interconnecting optical fibers include controllable wavelength-selective elements, such as magnetically controllable fiber gratings, which are capable of transmitting or reflecting individual channels within the multi-wavelength optical signals so that a selected channel of a particular wavelength can be routed from any of the input ports to any of the output ports of the switch.

65. CA 2298168 - CONTROLLABLE WAVELENGTH-SELECTIVE OPTICAL CROSS-CONNECT 19.08.2000
G02F 1/313
2298168 LUCENT TECHNOLOGIES INC. FATEHI, MOHAMMAD T.
In accordance with the invention, an optical cross-connect switch includes an optical router for distributing multi-wavelength optical input signals, an optical combiner for supplying multi-wavelength signals at the output ports of the switch, and optical fibers for interconnecting the optical router and optical combiner. Selected interconnecting optical fibers include controllable wavelength-selective elements, such as magnetically controllable fiber gratings, which are capable of transmitting or reflecting individual channels within the multi-wavelength optical signals so that a selected channel of a particular wavelength can be routed from any of the input ports to any of the output ports of the switch.


66. US 6097519 - Fiber optic network using space and wavelength multiplexed data channel arrays 01.08.2000
H04J 14/02
09231418 Lucent Technologies Inc. Ford Joseph E.
A network for multi-bit word parallel communication between optoelectronic chips on a two dimensional array of optical input and output channels carried on a single dimension of optical fibers. Each bit of a word is carried on a different wavelength and the multiple wavelengths carrying a word are wavelength multiplexed onto a single optical fiber. Multiple fibers can be joined into a one dimensional array of fibers. A transceiver for transmitting and receiving along the optical data channels comprises an array of modulators powered by individual wavelength light beams, either from individual monochromatic light sources and a light beam from a single broadband light source made to pass through a diffraction grating. The modulators are positioned so that each modulator reflects a different wavelength light beam, thereby providing multiple optical channels. Alternatively, multiple wavelengths are generated from CMOS integrated light sources. These multiple optical channels are then collimated and guided into one single mode fiber or multiple multimode fibers at its transmitting end. At the receiving end a diffraction grating is used to separate the distinct data channels by their individual wavelengths. The multiple wavelengths are then caused to fall on an array of optical detectors spaced according to the individual wavelengths to be detected. By constructing a one dimensional array of these fibers, a two dimensional array of optical data channels is realized. The size of the array is determined by the number of fibers and the number of distinct wavelengths combined in each fiber.


67. US 6067389 - Wavelength-selective optical cross-connect 23.05.2000
G02B 6/26
09123085 Lucent Technologies Inc. Fatehi Mohammad Taghi
An optical switch includes an optical router portion for distributing multi-wavelength optical signals received at input ports of the switch, an optical combiner portion for supplying multi-wavelength signals at the output ports of the switch, and optical fibers for interconnecting the optical router portion and optical combiner portion. Selected ones of the interconnecting optical fibers include wavelength-selective elements, such as fiber gratings, which are capable of transmitting or reflecting individual channels within the multi-wavelength optical signal so that a selected channel of a particular wavelength can be routed from any of the input ports to any of the output ports of the switch. In one exemplary embodiment, the optical router portion includes a plurality of input optical couplers, wherein each input optical coupler is associated with a corresponding input port of the optical switch. Similarly, the optical combiner portion includes a plurality of output optical couplers, wherein each output optical coupler is associated with a corresponding output port of the optical switch. Each input optical coupler together with its associated fiber gratings on the interconnecting optical fibers is used for distributing the signals received via the input ports while each output optical coupler together with its associated fiber gratings is used for combining the signals to be supplied at the output ports of the switch.


68. JP 2000106682 - WAVELENGTH SELECTIVE OPTICAL CROSS CONNECTION 11.04.2000
H04B 10/2
21171199 LUCENT TECHNOL INC FATEHI MOHAMMAD TAGHI
PROBLEM TO BE SOLVED: To easily switch respective channels of multiple wavelength light signals for each wavelength by respectively relating input and output photocouplers to the correspondent input and output photocouplers of an optical switch and controlling the transmitting operation mode and reflecting operation mode of fiber grids.
SOLUTION: An optical cross connector 300 receives K pieces of multi- wavelength light signals respectively having the channels of different wavelengths, routes the respective channels of multiple wavelength light signals between K pieces of cross connect inputs and M pieces of cross connect outputs and outputs M pieces of multiple wavelength light signals. As a K1 star coupler, having K pieces of input ports and a single output port, an output photocoupler 320 is related to respective cross connect output ports 315. An input photocoupler 310 and an output photocoupler 320 are mutually bonded through a mutual connection wavelength selective optical fiber 325, and the wavelength selective optical fiber 325 transmits or reflects one of respective wavelength channels of multiple wavelength light signals.
COPYRIGHT: (C)2000,JPO


69. US 6023361 - Fiber optic network using space and wavelength multiplexed data channel arrays 08.02.2000
G02F 1/13
09231054 Lucent Technologies Inc. Ford Joseph E.
A network for multi-bit word parallel communication between optoelectronic chips on a two dimensional array of optical input and output channels carried on a single dimension of optical fibers. Each bit of a word is carried on a different wavelength and the multiple wavelengths carrying a word are wavelength multiplexed onto a single optical fiber. Multiple fibers can be joined into a one dimensional array of fibers. A transceiver for transmitting and receiving along the optical data channels comprises an array of modulators powered by individual wavelength light beams, either from individual monochromatic light sources and a light beam from a single broadband light source made to pass through a diffraction grating. The modulators are positioned so that each modulator reflects a different wavelength light beam, thereby providing multiple optical channels. Alternatively, multiple wavelengths are generated from CMOS integrated light sources. These multiple optical channels are then collimated and guided into one single mode fiber or multiple multimode fibers at its transmitting end. At the receiving end a diffraction grating is used to separate the distinct data channels by their individual wavelengths. The multiple wavelengths are then caused to fall on an array of optical detectors spaced according to the individual wavelengths to be detected. By constructing a one dimensional array of these fibers, a two dimensional array of optical data channels is realized. The size of the array is determined by the number of fibers and the number of distinct wavelengths combined in each fiber.


70. EP 0977454 - Wavelength-selective optical cross-connect 02.02.2000
H04Q 11/00
99305712 LUCENT TECHNOLOGIES INC FATEHI MOHAMMAD TAGHI
An optical switch includes an optical router portion for distributing multi-wavelength optical signals received at input ports of the switch, an optical combiner portion for supplying multi-wavelength signals at the output ports of the switch, and optical fibers for interconnecting the optical router portion and optical combiner portion. Selected ones of the interconnecting optical fibers include wavelength-selective elements, such as fiber gratings, which are capable of transmitting or reflecting individual channels within the multi-wavelength optical signal so that a selected channel of a particular wavelength can be routed from any of the input ports to any of the output ports of the switch. In one exemplary embodiment, the optical router portion includes a plurality of input optical couplers, wherein each input optical coupler is associated with a corresponding input port of the optical switch. Similarly, the optical combiner portion includes a plurality of output optical couplers, wherein each output optical coupler is associated with a corresponding output port of the optical switch. Each input optical coupler together with its associated fiber gratings on the interconnecting optical fibers is used for distributing the signals received via the input ports while each output optical coupler together with its associated fiber gratings is used for combining the signals to be supplied at the output ports of the switch. By controlling the transmissive and reflective operating modes of the fiber gratings, the fiber gratings can facilitate the switching of individual channels of the multi-wavelength optical signals on a wavelength by wavelength basis.

71. CA 2273410 - WAVELENGTH-SELECTIVE OPTICAL CROSS-CONNECT 27.01.2000
H04Q 11/02
2273410 LUCENT TECHNOLOGIES, INC. FATEHI, MOHAMMAD TAGHI
An optical switch includes an optical router portion for distributing multi-wavelength optical signals received at input ports of the switch, an optical combiner portion for supplying multi-wavelength signals at the output ports of the switch, and optical fibers for interconnecting the optical router portion and optical combiner portion. Selected ones of the interconnecting optical fibers include wavelength-selective elements, such as fiber gratings, which are capable of transmitting or reflecting individual channels within the multi-wavelength optical signal so that a selected channel of a particular wavelength can be routed from any of the input ports to any of the output ports of the switch. In one exemplary embodiment, the optical router portion includes a plurality of input optical couplers, wherein each input optical coupler is associated with a corresponding input port of the optical switch. Similarly, the optical combiner portion includes a plurality of output optical couplers, wherein each output optical coupler is associated with a corresponding output port of the optical switch. Each input optical coupler together with its associated fiber gratings on the interconnecting optical fibers is used for distributing the signals received via the input ports while each output optical coupler together with its associated fiber gratings is used for combining the signals to be supplied at the output ports of the switch. By controlling the transmissive and reflective operating modes of the fiber gratings, the fiber gratings can facilitate the switching of individual channels of the multi-wavelength optical signals on a wavelength by wavelength basis.


72. US 6016219 - Optical protection switching system 18.01.2000
H01S 3/00
09168267 Lucent Technologies Inc. Fatehi Mohammad T.
An optical line protection switching system is realized by employing a plurality of rare earth-doped fiber optical amplifiers as gain-switched optical connections, for example gain-switched optical distributors, i.e., commutators, and/or gain-switched optical selectors in a gain switched optical line protection switching system. In one embodiment, at least one or more gain switched optical distributors are employed to realize so-called head-end switching of an incoming optical signal and one or more gain switched optical selectors are employed to realize so-called tail-end switching of the optical signal to form a 1.times.1 (1.times.N) optical line protection switching system. In another embodiment, an incoming optical signal is bridged to one or more optical paths, while the tail-end switching is realized by employing one or more gain-switched optical selectors to form a 1+1 (1+N) optical line protection switching system.


73. US 6002513 - Optical modulator providing independent control of attenuation and spectral tilt 14.12.1999
H04J 14/02
09102514 Lucent Technologies Inc. Goossen Keith Wayne
An optical modulator comprises at least two optically coupled MARS modulators, at least one having positive spectral tilt and at least one having negative spectral tilt. Both tilt and attenuation can be independently controlled by adjusting the air gaps of the constituent modulators. Preferred designs present linear spectral tilt.


74. JP 11331128 - METHOD AND DEVICE FOR HIGH CAPACITY CHIRPED PULSE WAVELENGTH DIVIDING MULTIPLEX COMMUNICATION 30.11.1999
H04J 14/8
4084299 LUCENT TECHNOL INC BOIVIN LUC
PROBLEM TO BE SOLVED: To overcome restriction on the aspect of a capacity which a chirped pulse WDM(wavelength division multiplexing) system holds by further optically multiplexing the chirped pulse wavelength dividing signal.
SOLUTION: An optical pulse with a band width exceeding 80 nm is extracted from a mode-locked (fixed) laser 202 with the speed of 36.7 MHz. The spectrum of each pulse is mapper on a time axis by being propagated through a part extending over 16 km of a single mode chirping fiber 204, and the pulse is extended. The chirped pulse is propagated to a modulator 210 through a circulator 207 and a polarization controller 208. After being amplified by a gain- flattened erbium-doped fiber power amplifier(EDFA) 212, this data flow is inputted to an optical multiplexer 214 which is used in an experiment for multiplexing a pseudo-data stream, and the bit rate of the data flow is increased by 64 times and becomes 2.35 Gb/s.
COPYRIGHT: (C)1999,JPO


75. JP 11289316 - QUALITY IMPROVEMENT OF POWER SPLIT TYPE PASSIVE OPTICAL NETWORK USING OPTICAL FILTERING 19.10.1999
H04J 14/0
1125699 LUCENT TECHNOL INC KNOX WAYNE HARVEY
PROBLEM TO BE SOLVED: To efficiently supply data in different wavelengths by making many wavelength signals to be supplied from an access provider, each of them having plural signal components consisting of preliminarily defined wavelengths and making a filter select and filter a signal component of many wavelength signals that are related and distributed, and to supply it to a remote user.
SOLUTION: In a PSPON system (power split type passive optical network), an access provider 20 supplies data in different bandwidths, and each remote unit receives the data from one of the bandwidths. No other remote unit receives the same bandwidth. The provider 20 has access to all remote units 40, 42 and 44 via a power dividing device 30. The provider 20 supplies many bandwidth signals to the device 30 and the device 30 distributes the signals to all the units 40, 42 and 44. Each unit 40, 42 and 44 is provided with an appropriate receiver and receives a related signal.
COPYRIGHT: (C)1999,JPO


76. US 5959767 - Loss-less optical cross-connect 28.09.1999
H04B 9/00
08777890 Lucent Technologies Fatehi Mohammad T.
A loss-less optical cross-connect advantageously employs a plurality of optical rare earth-doped fiber optical amplifiers as gain-switched optical connections, for example, gain-switched optical distributors and gain-switched optical selectors. Each of the optical rare earth-doped fiber optical amplifiers acts as an ON/OFF switch. Also, both the gain-switched optical distributors and selectors employed in the optical cross-connect arrangement of this invention are a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and the plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding optical amplifier are selected by use of a control circuit arrangement to determine which output port or ports is (are) connected to the input port. The rare earth-doped fiber optical amplifiers and the corresponding pumps are employed advantageously for both the gain-switched optical distributors and the gain-switched optical selectors. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical amplifiers to be activated, thus routing the input signals at any of a plurality of given wavelengths to the corresponding output line (or lines if broadcasting capability is employed). Again, the rare earth-doped fiber optical amplifiers and the corresponding pumps are employed advantageously for both the gain-switched optical distributors and the gain-switched optical selectors.


77. EP 0938197 - High capacity chirped-pulse wavelength-division multiplexed communication method and apparatus 25.08.1999
H04J 14/02
99300951 LUCENT TECHNOLOGIES INC BOIVIN LUC
A high-capacity, chirped-pulse wavelength-division multiplexed communications apparatus and method in which a chirped-pulse, wavelength-division multiplexed signal is further optically multiplexed thereby enhancing bit rates per channel. A multifrequency optical source for supplying an optical signal having a number of wavelength division multiplexed (WDM) channels; a power splitter for splitting the optical signal from the multifrequency source into a number of signals; a number of time delay lines, for delaying each one of the signals independently; a number of data encoding modulators for modulating each one of the delayed signals; and a power combiner for combining the number of delayed, modulated signals into a single signal such that the multifrequency optical source signal is multiplexed by a desired amount.

78. US 5930013 - Optical switched selector 27.07.1999
H04J 14/00
08777891 Lucent Technologies Inc. Fatehi Mohammad T.
A gain-switched optical selector is realized by employing an optical rare earth-doped fiber optical amplifier as the switching element per se. Each of the optical rare earth-doped optical amplifiers acts as an ON/OFF switch. Also, the gain-switched optical selector of this invention is a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and a plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding optical amplifier are selected by use of a monitor arrangement to determine which signal is to be selected and routed to an output. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical input signals at any of a plurality of given wavelengths.


79. EP 0930733 - Upgrading a power-splitting passive optical network using optical filtering 21.07.1999
H04B 10/213
99300199 LUCENT TECHNOLOGIES INC KNOX WAYNE HARVEY
The passive optical network system and method for providing a predetermined wavelength of data to remote users according to the present invention includes a multiple wavelength transmitter for transmitting a multiwavelength signal. The multiwavelength signal is provided by an access provider and has a plurality of signal components each of predetermined wavelength. A power-splitting passive optical network receives and power-splits the multiwavelength signal into a plurality of distributed multiwavelength signals each associated with a respective remote user. A filter selectively filters out, for each remote user, ones of the signal components of the associated distributed multiwavelength signal to provide the remote user with a selected one signal component of predetermined wavelength.

80. CA 2257731 - UPGRADING A POWER-SPLITTING PASSIVE OPTICAL NETWORK USING OPTICAL FILTERING 20.07.1999
H04B 10/20
2257731 LUCENT TECHNOLOGIES, INC. KNOX, WAYNE HARVEY
The passive optical network system and method for providing a predetermined wavelength of data to remote users according to the present invention includes a multiple wavelength transmitter for transmitting a multiwavelength signal. The multiwavelength signal is provided by an access provider and has a plurality of signal components each of predetermined wavelength. A power-splitting passive optical network receives and power-splits the multiwavelength signal into a plurality of distributed multiwavelength signals each associated with a respective remote user. A filter selectively filters out, for each remote user, ones of the signal components of the associated distributed multiwavelength signal to provide the remote user with a selected one signal component of predetermined wavelength.


81. US 5912749 - Call admission control in cellular networks 15.06.1999
H04J 14/08
08798895 Lucent Technologies Inc. Harstead Edward Eric
A unique time slot is assigned to each of a plurality of wavelengths emitted by a single, centralized wavelength division multiplexed optical source to provide a "bit interleaved" WDM signal. In accordance with an illustrative embodiment of the present invention, the thus-developed bit-interleaved WDM signal is replicated in cascaded stages of amplification and power splitting before data is encoded for respective frequency dependent receivers as, for example, a plurality of passive optical networks. Because the output of the optical source need not be encoded with data for the respective receivers until after many stages of splitting and amplification, a small number of time division multiplexing (TDM) modulators synchronized to the source may be used to deliver data to potentially tens of thousands of subscribers.


82. US 5912751 - Fiber optic network using space and wavelength multiplexed data channel arrays 15.06.1999
H04J 14/02
08691101 Lucent Technologies Inc. Ford Joseph E.
A network for multi-bit word parallel communication between optoelectronic chips on a two dimensional array of optical input and output channels carried on a single dimension of optical fibers. Each bit of a word is carried on a different wavelength and the multiple wavelengths carrying a word are wavelength multiplexed onto a single optical fiber. Multiple fibers can be joined into a one dimensional array of fibers. A transceiver for transmitting and receiving along the optical data channels comprises an array of modulators powered by individual wavelength light beams, either from individual monochromatic light sources and a light beam from a single broadband light source made to pass through a diffraction grating. The modulators are positioned so that each modulator reflects a different wavelength light beam, thereby providing multiple optical channels. Alternatively, multiple wavelengths are generated from CMOS integrated light sources. These multiple optical channels are then collimated and guided into one single mode fiber or multiple multimode fibers at its transmitting end. At the receiving end a diffraction grating is used to separate the distinct data channels by their individual wavelengths. The multiple wavelengths are then caused to fall on an array of optical detectors spaced according to the individual wavelengths to be detected. By constructing a one dimensional array of these fibers, a two dimensional array of optical data channels is realized. The size of the array is determined by the number of fibers and the number of distinct wavelengths combined in each fiber.


83. US 5889610 - Optical protection switching system 30.03.1999
G02B 6/26
08777892 Lucent Technologies Inc. Fatehi Mohammad T.
An optical line protection switching system is realized by employing a plurality of rare earth-doped fiber optical amplifiers as gain-switched optical connections, for example gain-switched optical distributors, i.e., commutators, and/or gain-switched optical selectors in a gain switched optical line protection switching system. In one embodiment, at least one or more gain switched optical distributors are employed to realize so-called head-end switching of an incoming optical signal and one or more gain switched optical selectors are employed to realize so-called tail-end switching of the optical signal to form a 1.times.1 (1.times.N) optical line protection switching system. In another embodiment, an incoming optical signal is bridged to one or more optical paths, while the tail-end switching is realized by employing one or more gain-switched optical selectors to form a 1+1 (1+N) optical line protection switching system.


84. MX PA/a/1997/010246 - DISTRIBUIDOR CONMUTADO OPTICO 11.01.1999
H01Q 15/00
PA/a/1997/010246 LUCENT TECHNOLOGIESINC. WAYNE HARVEY KNOX
La presente invención se refiere a un distribuidoróptico conmutado de ganancia es decir conmutador, que se logra al emplear un amplificadoróptico de fibras adulteradas con tierras rarasópticas, como el elemento de conmutación per se. Cada uno de los amplificadoresópticos de fibras adulteradas con tierras rarasópticas actúa como un conmutador de ENCENDIDO/APAGADO (ON/OFF). También, el distribuidoróptico conmutado de ganancia de esta invención es un complemento natural en los sistemas de comunicacionesópticos amplificadosópticamente acutales. En una modalidad, esto se logra al emplear un circuito de selección de bomba en conjunto con una pluralidad de bombas y una pluralidad de amplificadoresópticos de fibras adulteradas con tierras raras correspondientes. El amplificador y bomba particular correspondiente se eligen por uso de una estructura de monitor para determinar cual señal se va a elegir y dirigir a una salida. En otra modalidad, una estructura de bomba asídenominada sintonizada, se emplea un conjunto con una pluralidad de filtros y una pluralidad correspondiente de amplificadoresópticos de fibras adulteradas con tierras raras. Una estructura de sintonización de bomba se emplea para controlar la bomba sintonizable a fin de seleccionar la apropiada de una pluralidad de señales de alimentaciónóptica en cualquiera de una pluralidad de longitudes de onda determinadas.

85. MX PA/a/1997/010244 - SELECTOR CONMUTADO OPTICO 11.01.1999
H01Q 15/00
PA/a/1997/010244 LUCENT TECHNOLOGIESINC. WAYNE HARVEY KNOX
La presente invención se refiere a un selectoróptico conmutado por ganancia, que se logra al emplear un amplificadoróptico de fibra adulterada con tierra raraóptica como el elemento de conmutación per se. Cada uno de los amplificadoresópticos de fibras adulteradas con tierras rarasópticas, actúa como un conmutador de ENCENDIDO/APAGADO. También, el selectoróptico conmutado de ganancia de esta invención es un complemento natural en los sistemas de comunicacionesópticos amplificadosópticamente en la actualidad. En una modalidad, esto se logra al emplear un circuito selector de bomba, en conjunto con una pluralidad de bombas y una pluralidad de amplificadoresópticos de fibras adulteradas con tierras raras. La bomba particular y el amplificadoróptico correspondiente se elige por uso de una estructura de verificación, para determinar que señal se va a seleccionar y dirigir a una salida. En otra modalidad, una estructura de bomba asídenominada sintonizada se emplea en conjunto con una pluralidad de filtros y una pluralidad correspondientes de amplificadoresópticos de fibras adulteradas con tierras raras. Una estructura de sintonización de bomba se emplea para controlar la bomba sintonizable a fin de seleccionar la apropiada de las señales de alimentaciónópticas a cualquiera de una pluralidad de longitudes de onda determinadas.

86. MX PA/a/1997/010242 - SISTEMA DE CONMUTACION DE PROTECCION OPTICA 11.01.1999
H01Q 15/00
PA/a/1997/010242 LUCENT TECHNOLOGIESINC. WAYNE HARVEY KNOX
La presente invención ser refiere a un sistema de conmutación para protección de líneaóptica que se logra al emplear una pluralidad de amplificadoresópticos de fibras adulteradas con tierras raras, como conexionesópticas conmutadas de ganancia, por ejemplo distribuidoresópticos conmutados de ganancia, es decir conmutadores y/o selectoresópticos conmutados de ganancia, en un sistema de conmutación para protección de líneaóptica conmutada de ganancia. En una modalidad, al menos uno o más distribuidoresópticos conmutados de ganancia se emplean para lograr la asíllamada conmutación de extremo de cabeza para una señalóptica de ingreso y uno o más selectoresópticos conmutados de ganancia se emplean para lograr la asíllamada conmutación de extremo de cola de la señalóptica, para formar un sistema de conmutación para protecicón de líneaóptica 1x1 (1xN). En otra modalidad, una señalóptica de ingreso se puentea a una o más trayectoriasópticas, mientras que la conmutación de extremo de cola se logra al emplear uno o más selectoresópticos conmutado de ganancia, para formar un sistema de conmutación para protección de líneaóptica 1+1 (1+N).

87. US 5822106 - Synchronization of digital systems using optical pulses and mdoulators 13.10.1998
G02F 1/03
08774551 Lucent Technologies Inc. Knox Wayne H.
The present invention provides synchronization of logic signals in a digital system using optical pulses generated from optical modulators. In one embodiment of the present invention, electrically driven optical modulators are positioned at electrical outputs of interest, and the modulators are read out in accordance with synchronized optical pulses produced from a timing source, where the optical pulse lengths are relatively short compared to the electrical output pulse length. The resulting modulated optical pulses output from the optical modulators are then all once more synchronous, with the skew in the original electrical signals having been removed. These optical pulses can then be communicated over optical channels, such as fiber or free space, with well controlled delay, thereby also reducing problems of variable delay in electrical connections. The optical signals can then be read by photodetectors at the inputs to further stages of digital processing, giving inputs that are synchronized once more despite the different delays or skews in the original electrical signals.


88. US 5815613 - Optical switched distributor 29.09.1998
G02B 6/26
08777894 Lucent Technologies Inc. Fatehi Mohammad T.
A gain-switched optical distributor, i.e., commutator, is realized by employing an optical rare earth-doped fiber optical amplifier as the switching element per se. Each of the optical rare earth-doped fiber optical amplifiers acts as an ON/OFF switch. Also, the gain-switched optical distributor of this invention is a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and a plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding amplifier is selected by use of a monitor arrangement to determine which signal is to be selected and routed to an output. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical input signals at any of a plurality of given wavelengths.


89. JP 10233546 - LOSSLESS LIGHT CROSS-CONNECTION CONFIGURATION 02.09.1998
G02B 6/0
35597597 LUCENT TECHNOL INC FATEHI MOHAMMAD T
PROBLEM TO BE SOLVED: To make it possible to broadcast a light signal to a plurality of outputs from an arbitrary input and to it in a multiple-wavelength optical network by a method wherein an exchange-type pump together with an identical rare-earth-doped light amplifier is used for a gain-exchange optical distributor and a selector.
SOLUTION: In a gain-exchange optical distributor and a star optical coupler 102-1 as a selector, an input light signal on an input 101-1 is coupled to respective light amplifiers 103-11 to 103-14 which use a rear-earth-doped fiber. In a star optical coupler 102-2, an input light signal on an input 101-2 is coupled to light amplifiers 103-21 to 103-24. In addition, a star optical coupler 102-3 is coupled to light amplifiers 103-31 to 103-34, and a start optical coupler 102-4 is coupled to light amplifiers 103-41 to 103-44. Then, exchange-type pumps 104-11 to 104-14 and 104-41 to 104-44 are made to correspond to light amplifiers 103-11 to 103-14 and 103-41 to 103-44.
COPYRIGHT: (C)1998,JPO


90. CA 2227250 - PASSIVE OPTICAL TELECOMMUNICATION SYSTEM EMPLOYING MULTIPLE WAVELENGTH SOURCE AND PLURAL POWER SPLITTING STAGES 11.08.1998
H04J 14/02
2227250 LUCENT TECHNOLOGIES INC. HARSTEAD, EDWARD ERIC
A unique time slot is assigned to each of a plurality of wavelengths emitted by a single, centralized wavelength division multiplexed optical source to provide a "bit interleaved" WDM signal. In accordance with an illustrative embodiment of the present invention, the thus-developed bit-interleaved WDM signal is replicated in cascaded stages of amplification and power splitting before data is encoded for respective frequency dependent receivers as, for example, a plurality of passive optical networks. Because the output of the optical source need not be encoded with data for the respective receivers until after many stages of splitting and amplification, a small number of time division multiplexing (TDM) modulators synchronized to the source may be used to deliver data to potentially tens of thousands of subscribers.


91. JP 10209544 - OPTICAL SWITCH SELECTOR 07.08.1998
G02B 6/0
35597697 LUCENT TECHNOL INC FATEHI MOHAMMAD T
PROBLEM TO BE SOLVED: To obtain an optical communication element, especially, an optical selector switch with low switching speed by using a rare-earth doped fiber light amplifier as a switch element of a gain switch optical selector.
SOLUTION: The secondary output of a coupler 207 is supplied to a light- electricity convertor 208, and its output is subject to accurate pumping selection in a selection circuit 209. In this step, the circuit 208 monitors the power level of a selection signal and determines a parameter and an ID tag related to the selection route to be supplied to the coupler 207. In addition, an instruction and control information from an instruction and control device 210 is supplied to the circuit 209, and it is used together with an information from other net element in an optical system, so that a pump 205 or a pump 206 is selected, and according to the selection, an amplifier 203 or an amplifier 204 is selected to output an optical signal as an output to an optical fiber 211 through the coupler 207.
COPYRIGHT: (C)1998,JPO


92. JP 10209966 - OPTICAL PROTECTION SWITCHING SYSTEM 07.08.1998
H04B 10/2
32739097 LUCENT TECHNOL INC FATEHI MOHAMMAD T
PROBLEM TO BE SOLVED: To improve the operating speed and reliability by using an optical fiber amplifier consisting of an optical fiber of a rare earth dope as a gain switching optical connection device to construct a gain switching optical distributor and a gain switching optical selector and securing the cross connection between the distributor and the selector.
SOLUTION: At a head end, the input optical signal received at an input terminal 101 is inputted to the GSOA(gain switching optical amplifier) 103 and 108 via an optical star coupler 102. Each of GSOA 103 and 108 contains an optical fiber amplifier consisting of an optical fiber of an erbium dope, and the input optical signal and a pump signal are inputted to the input side of the GSOA via a wavelength division multiplex coupler and then outputted from the output side via an optical isolator respectively. One of both GSOA 103 and 108 is turned on under the control of a pump controller 111 and sends the optical signal to one of loss type optical fibers/optical devices 104 and 109. Thus, a gain switching optical distributor is formed.
COPYRIGHT: (C)1998,JPO


93. JP 10197736 - OPTICAL SWITCH DISTRIBUTOR 31.07.1998
G02B 6/0
35597797 LUCENT TECHNOL INC FATEHI MOHAMMAD T
PROBLEM TO BE SOLVED: To cancel problems in operating speed by providing pump configuration for supplying an inputted optical signal to plural outputs more than one in response to a command signal for controlling the respective ON/OFF states of plural optical amplifiers.
SOLUTION: An optical fiber line 201 respectively supplies the optical signal through an optical star coupler (coupler) 202 to a rare earth dope fiber optical amplifier (amplifier) 203 and an amplifier 205 with a prescribed wavelength or wavelength setting value. Besides, a pump 204 is connected to the amplifier 203 and a pump 206 is connected to the amplifier 205. Then, command/control information from command/control equipment 214 is supplied to a pump selector circuit 213 and while using the command/control information together with information from the other network element of optical system, it is selected whether the pump 204 or the pump 206 is to be selected. According to the result, it is selected whether the amplifier 203 or the amplifier 205 is to be switched to ON and OFF.
COPYRIGHT: (C)1998,JPO


94. CN 1188240 - Optical switched distributor 22.07.1998
G02F 1/00
97123483.3 Lucent Technologies Inc. Mohammad Taghi Fatehi
A gain-switched optical distributor, i.e., commutator, is realized by employing an optical rare earth-doped fiber optical amplifier as the switching element per se. Each of the optical rare earth-doped fiber optical amplifiers acts as an ON/OFF switch. Also, the gain-switched optical distributor of this invention is a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and a plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding amplifier is selected by use of a monitor arrangement to determine which signal is to be selected and routed to an output. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical input signals at any of a plurality of given wavelengths.

95. CN 1188239 - Optical protection switching system 22.07.1998
G02F 1/00
97123482.5 Lucent Technologies Inc. Mohammad Taghi Fatehi
An optical line protection switching system is realized by employing a plurality of rare earth-doped fiber optical amplifiers as gain-switched optical connections, for example gain-switched optical distributors, i.e., commutators, and/or gain-switched optical selectors in a gain switched optical line protection switching system. In one embodiment, at least one or more gain switched optical distributors are employed to realize so-called head-end switching of an incoming optical signal and one or more gain switched optical selectors are employed to realize so-called tail-end switching of the optical signal to form a 1x1 (1xN) optical line protection switching system.

96. EP 0851251 - Optical switched distributor 01.07.1998
G02B 6/28
97310142 LUCENT TECHNOLOGIES INC FATEHI MOHAMMAD T
A gain-switched optical distributor, i.e., commutator, is realized by employing an optical rare earth-doped fiber optical amplifier as the switching element per se. Each of the optical rare earth-doped fiber optical amplifiers acts as an ON/OFF switch. Also, the gain-switched optical distributor of this invention is a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and a plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding amplifier is selected by use of a monitor arrangement to determine which signal is to be selected and routed to an output. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical input signals at any of a plurality of given wavelengths.

97. EP 0851545 - Gain switched optical selector 01.07.1998
G02F 1/313
97310192 LUCENT TECHNOLOGIES INC FATEHI MOHAMMAD T
A gain-switched optical selector is realized by employing an optical rare earth-doped fiber optical amplifier as the switching element per se. Each of the optical rare earth-doped optical amplifiers acts as an ON/OFF switch. Also, the gain-switched optical selector of this invention is a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and a plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding optical amplifier are selected by use of a monitor arrangement to determine which signal is to be selected and routed to an output. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical input signals at any of a plurality of given wavelengths.

98. EP 0851705 - Loss-less optical cross-connect 01.07.1998
H04Q 11/00
97310143 LUCENT TECHNOLOGIES INC FATEHI MOHAMMAD T
A loss-less optical cross-connect advantageously employs a plurality of optical rare earth-doped fiber optical amplifiers as gain-switched optical connections, for example, gain-switched optical distributors and gain-switched optical selectors. Each of the optical rare earth-doped fiber optical amplifiers acts as an ON/OFF switch. Also, both the gain-switched optical distributors and selectors employed in the optical cross-connect arrangement of this invention are a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and the plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding optical amplifier are selected by use of a control circuit arrangement to determine which output port or ports is (are) connected to the input port. The rare earth-doped fiber optical amplifiers and the corresponding pumps are employed advantageously for both the gain-switched optical distributors and the gain-switched optical selectors. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical amplifiers to be activated, thus routing the input signals at any of a plurality of given wavelengths to the corresponding output line (or lines if broadcasting capability is employed). Again, the rare earth-doped fiber optical amplifiers and the corresponding pumps are employed advantageously for both the gain-switched optical distributors and the gain-switched optical selectors.

99. EP 0851704 - Optical protection switching system 01.07.1998
H04Q 11/00
97310140 LUCENT TECHNOLOGIES INC FATEHI MOHAMMAD T
An optical line protection switching system is realized by employing a plurality of rare earth-doped fiber optical amplifiers as gain-switched optical connections, for example gain-switched optical distributors, i.e., commutators, and/or gain-switched optical selectors in a gain switched optical line protection switching system. In one embodiment, at least one or more gain switched optical distributors are employed to realize so-called head-end switching of an incoming optical signal and one or more gain switched optical selectors are employed to realize so-called tail-end switching of the optical signal to form a 1x1 (1xN) optical line protection switching system. In another embodiment, an incoming optical signal is bridged to one or more optical paths, while the tail-end switching is realized by employing one or more gain-switched optical selectors to form a 1+1 (1+N) optical line protection switching system.

100. CA 2220225 - OPTICAL SWITCHED DISTRIBUTOR 30.06.1998
G02F 1/295
2220225 LUCENT TECHNOLOGIES, INC. KNOX, WAYNE HARVEY
A gain-switched optical distributor, i.e., commutator, is realized by employing an optical rare earth-doped fiber optical amplifier as the switching element per se. Each of the optical rare earth-doped fiber optical amplifiers acts as an ON/OFF switch. Also, the gain-switched optical distributor of this invention is a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and a plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump andcorresponding amplifier is selected by use of a monitor arrangement to determine which signal is to be selected and routed to an output. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical input signals at any of a plurality of given wavelengths.


101. CA 2220234 - LOSS-LESS OPTICAL CROSS-CONNECT 30.06.1998
H04Q 3/52
2220234 LUCENT TECHNOLOGIES, INC. KNOX, WAYNE HARVEY
A loss-less optical cross-connect advantageously employs a plurality of optical rare earth-doped fiber optical amplifiers as gain-switched optical connections, for example, gain-switched optical distributors and gain-switched optical selectors. Each of the optical rare earth-doped fiber optical amplifiers acts as an ON/OFF switch. Also, both the gain-switched optical distributors and selectors employed in the optical cross-connect arrangement of this invention are a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and the plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding optical amplifier are selected by use of a control circuit arrangement to determine which output port or ports is (are) connected to the input port. The rare earth-doped fiber optical amplifiers and the corresponding pumps are employed advantageously for both the gain-switched optical distributors and the gain-switched optical selectors. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with aplurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical amplifiers to be activated, thus routing the input signals at any of a plurality of given wavelengths to the corresponding output line (or lines if broadcasting capability is employed). Again, the rare earth-doped fiber optical amplifiers and the corresponding pumps are employed advantageously for both the gain-switched optical distributors and the gain-switched optical selectors.


102. CA 2220267 - OPTICAL SWITCHED SELECTOR 30.06.1998
H04Q 3/52
2220267 LUCENT TECHNOLOGIES, INC. FATEHI, MOHAMMAD TAGHI
A gain-switched optical selector is realized by employing an optical rare earth-doped fiber optical amplifier as the switching element per se. Each of the optical rare earth-doped optical amplifiers acts as an ON/OFF switch. Also, the gain-switched optical selector of this invention is a natural fit into today's optically amplified optical communication systems. In one embodiment, this is realized by employing a pump select circuit in conjunction with a plurality of pumps and a plurality of corresponding rare earth-doped fiber optical amplifiers. The particular pump and corresponding optical amplifier are selected by use of a monitor arrangement to determine which signal is to be selected and routed to an output. In another embodiment, a so-called tuned pump arrangement is employed in conjunction with a plurality of filters and a corresponding plurality of rare earth-doped fiber optical amplifiers. A pump tuning arrangement is employed to control the tunable pump in order to select the appropriate one of a plurality of optical input signals at any of a plurality of given wavelengths.


103. CA 2220266 - OPTICAL PROTECTION SWITCHING SYSTEM 30.06.1998
H04Q 3/52
2220266 LUCENT TECHNOLOGIES, INC. KNOX, WAYNE HARVEY
An optical line protection switching system is realized by employing a plurality of rare earth-doped fiber optical amplifiers as gain-switched optical connections, for example gain-switched optical distributors, i.e., commutators, and/or gain-switched optical selectors in a gain switched optical line protection switching system. In one embodiment, at least one or more gain switched optical distributors are employed to realize so-called head-end switching of an incoming optical signal and one or more gain switched optical selectors are employed to realize so-called tail-end switching of the optical signal to form a 1x1 (1xN) optical line protection switching system. In another embodiment, an incoming optical signal is bridged to one or more optical paths, while the tail-end switching is realized by employing one or more gain-switched optical selectors to form a 1+1 (1+N) optical line protection switching system.


104. MX PA/a/1997/003090 - ESTRUCTURA DE REFLECTOR BRAGG SATURABLE Y PROCESOPARA FABRICAR LA MISMA 01.04.1998
H01S 3/02
PA/a/1997/003090 LUCENT TECHNOLOGIESINC. WAYNE HARVEY KNOX
La presente invención se refiere a fabricación simplificada y de baja pérdidaóptica que se logran por un reflector no lineal que incorpora uno o más pozos cuánticos semiconductores dentro de una capa para alivio de tensión de n medias longitudes de onda ( en donde n es un entero non mayor a cero) que se forma en un reflector de pila de cuarto de onda semiconductor standard. El crecimiento de la capa del medio de longitud de onda se controla, de manera tal que se forman dislocaciones en concentraciones suficientes en la región de interfase para actuar efectivamente como fuentes recombinantes no radiantes. Después de saturación, estas fuentes de recombinación retiran portadores en el pozo cuántico antes que el siguiente viaje redondo del pulsoóptico llegue a la cavidad láser. El reflector no lineal es adecuado para la fijación de modo láser a elevadas longitudes de onda asociadas con muchas aplicaciones de telecomunicaciones actualmente contempladas y proporciona a estas longitudes de onda, una respuesta dependiente de intensidad que permite emplear para absorción saturable directamente en una cavidad oscilante principal de un láser. La intensidad de saturación de un reflector no lineal y de esta manera propiedades de fijación de modo láser relacionadas pueden controlarse al disponer el o los pozos cuánticos en una posición particular dentro de la capa para alivio de tensión.

105. US 5726787 - Apparatus and method for improving signal-to-noise ratio in wavelength division multiplexing soliton transmission systems 10.03.1998
H04B 10/00
08579864 Lucent Technologies Inc. Haus Hermann A.
For use in a soliton optical pulse transmission system, an apparatus for, and method of, increasing a signal-to-noise ratio of the system. The apparatus includes: (1) a component for receiving a soliton and an accompanying background noise from the system and increasing a power density of the soliton and the accompanying background noise and (2) a saturable absorber, having a predetermined recombination rate, for receiving and absorbing a portion of the soliton and the accompanying background noise, the predetermined recombination rate causing the saturable absorber to absorb a lesser portion of the soliton than of the accompanying background noise, the component having increased the power density of the soliton and the accompanying background noise to increase a sensitivity of the saturable absorber, the apparatus thereby increasing the signal-to-noise ratio of the system.


106. JP 10065244 - SATURABLE BRAGG REFLECTOR STRUCTURE AND FABRICATION THEREOF 06.03.1998
H01S 3/2
11168497 LUCENT TECHNOL INC CUNNINGHAM JOHN EDWARD
PROBLEM TO BE SOLVED: To obtain a saturable Bragg reflector in which low optical loss is achieved by including one or more semiconductor quantum well in an n/2- wavelength strain relax layer (n is an odd number larger than 0) formed on a standard 1/4 wavelength stack reflector.
SOLUTION: The saturable Bragg reflector comprises a plurality of quantum wells 12a, 12b, grown in an InP strain relax layer 14 which is grown on a 1/4-wavelength stack dielectric mirror structure 16. The mirror structure 16 comprises several layers formed in a GaAs/AlAs semiconductor compound which is formed on a GaAs substrate 18. It is grown on the first part of the strain relax layer 14 and the uppermost layer of the 1/4-wavelength stack structure 16 having a concentration of dislocation. When a sufficient concentration takes place in the interface region, these dislocations function as nonradiation recoupling sources. After saturation, these recoupling sources remove carriers of quantum well, before the next reciprocation of an optical pulse arrives at a laser cavity. According to the arrangement, low optical loss can be achieved and a high response time is obtained.
COPYRIGHT: (C)1998,JPO


107. US 5701327 - Saturable Bragg reflector structure and process for fabricating the same 23.12.1997
G02F 1/03
08640377 Lucent Technologies Inc. Cunningham John Edward
Low optical loss and simplified fabrication are achieved by a nonlinear reflector which incorporates one or more semiconductor quantum wells within an n half-wavelengths strain relief layer (where n is an odd integer greater than zero) that is formed on a standard semiconductor quarter wave stack reflector. Growth of the half-wavelength layer is controlled so that dislocations are formed in sufficient concentration at the interface region to act effectively as non-radiative recombination sources. After saturation, these recombination sources remove carriers in the quantum well before the next round trip of the optical pulse arrives in the laser cavity. The nonlinear reflector is suitable for laser modelocking at the high wavelengths associated with many currently contemplated telecommunications applications and provides, at such wavelengths, an intensity dependent response that permits it to be used for saturable absorption directly in a main oscillating cavity of a laser. Saturation intensity of the nonlinear reflector and thereby related laser modelocking properties can be controlled by disposing the quantum well(s) at a particular position within the strain relief layer.


108. EP 0805529 - Saturable bragg reflector structure and process for fabricating the same 05.11.1997
G02F 1/35
97302754 LUCENT TECHNOLOGIES INC CUNNINGHAM JOHN EDWARD
Low optical loss and simplified fabrication are achieved by a nonlinear reflector which incorporates one or more semiconductor quantum wells within an n half-wavelengths strain relief layer (where n is an odd integer greater than zero) that is formed on a standard semiconductor quarter wave stack reflector. Growth of the half-wavelength layer is controlled so that dislocations are formed in sufficient concentration at the interface region to act effectively as non-radiative recombination sources. After saturation, these recombination sources remove carriers in the quantum well before the next round trip of the optical pulse arrives in the laser cavity. The nonlinear reflector is suitable for laser modelocking at the high wavelengths associated with many currently contemplated telecommunications applications and provides, at such wavelengths, an intensity dependent response that permits it to be used for saturable absorption directly in a main oscillating cavity of a laser. Saturation intensity of the nonlinear reflector and thereby related laser modelocking properties can be controlled by disposing the quantum well(s) at a particular position within the strain relief layer.

109. CA 2200925 - SATURABLE BRAGG REFLECTOR STRUCTURE AND PROCESS FOR FABRICATING THE SAME 30.10.1997
G02B 5/08
2200925 LUCENT TECHNOLOGIES INC. CUNNINGHAM, JOHN EDWARD
Low optical loss and simplified fabrication are achieved by a nonlinear reflector which incorporates one or more semiconductor quantum wells within an n half-wavelengths strain relief layer (where n is an odd integer greater than zero) that is formed on a standard semiconductor quarter wave stack reflector. Growth of the half- wavelength layer is controlled so that dislocations are formed in sufficient concentration at the interface region to act effectively as non-radiative recombination sources. After saturation, these recombination sources remove carrier, in the quantum well before the next round trip of the optical pulse arrives in the laser cavity. The nonlinear reflector is suitable for laser modelocking at the high wavelengths associated with many currently contemplated telecommunications applications and provides, at such wavelengths, an intensity dependent response that permits it to be used for saturable absorption directly in a main oscillating cavity of a laser. Saturation intensity of the nonlinear reflector and thereby related laser modelocking properties can be controlled by disposing the quantum well(s) at a particular position within the strain relief layer.


110. MX PA/a/1996/005044 - SISTEMA DE TELECOMUNICACIONES CON LONGITUD DE ONDAMULTIPLE DE PULSO COMPRIMIDO 04.09.1997
H04J 14/02
PA/a/1996/005044 AT&T CORP. WAYNE HARVEY KNOX
La presente invención se refiere a un aparato de múltiples longitudes de ondasópticas, caracterizado por:un dispersoróptico para recibir cortos pulsosópticos a una primer velocidad y formar con ellos un tren de pulsosópticos comprimidos con cada pulsoóptico comprimido que se extiende sobre una pluralidad de periodos de tiempo, cada periodo de tiempo asociado con un canal de longitud de ondaóptica diferente;y un moduladoróptico que codifica un canal de longitud de ondaóptica de uno o más de los periodos de tiempo selectos del tren de pulsosópticos comprimidos, utilizando una señal de datos que opera a una segunda velocidad igual a o mayor que la primer velocidad para formar una señalóptica codificada.

111. EP 0782284 - Apparatus and method for improving signal-to-noise ratio in wavelength division multiplexing soliton transmission systems 02.07.1997
H04J 14/02
96308821 LUCENT TECHNOLOGIES INC HAUS HERMAN ANTON
For use in a soliton optical pulse transmission system, an apparatus for, and method of, increasing a signal-to-noise ratio of the system. The apparatus includes: (1) a component for receiving a soliton and an accompanying background noise from the system and increasing a power density of the soliton and the accompanying background noise and (2) a saturable absorber, having a predetermined recombination rate, for receiving and absorbing a portion of the soliton and the accompanying background noise, the predetermined recombination rate causing the saturable absorber to absorb a lesser portion of the soliton than of the accompanying background noise, the component having increased the power density of the soliton and the accompanying background noise to increase a sensitivity of the saturable absorber, the apparatus thereby increasing the signal-to-noise ratio of the system.

112. CA 2190892 - APPARATUS AND METHOD FOR IMPROVING SIGNAL-TO-NOISE RATIO IN WAVELENGTH DIVISION MULTIPLEXING SOLITON TRANSMISSION SYSTEMS 29.06.1997
H04B 10/18
2190892 HAUS, HERMAN ANTON
For use in a soliton optical pulse transmission system, an apparatus for, and method of, increasing a signal-to-noise ratio of the system. The apparatus includes: (1) a component for receiving a soliton and an accompanying background noise from the system and increasing a power density of the soliton and the accompanying background noise and (2) a saturable absorber, having a predetermined recombination rate, for receiving and absorbing a portion of the soliton and the accompanying background noise, the predetermined recombination rate causing the saturable absorber to absorb a lesser portion of the soliton than of the accompanying background noise, the component having increased the power density of the soliton and the accompanying background noise to increase a sensitivity of the saturable absorber, the apparatus thereby increasing the signal-to-noise ratio of the system.


113. CN 1152224 - Chirped-pulse multiple wavelength telecommunications system 18.06.1997
H04B 10/12
96112466.0 AT & T Corp. Wayne Harvey Knox
An apparatus and method provides optical multiple wavelength signals using a single optical broadband source to generate many independent optical wavelength channels. An optical transmitter includes a pulse chirping device which separates the frequency components of periodic optical pulses in the time domain forming separate wavelength channels which are separately modulated by a high-speed broadband optical modulator. A receiver includes a passive splitter to separate the individual wavelength channels. The chirped-pulse transmitter can then be conveniently adjusted to provide optimum overlap of wavelength channels with the modulating channel spectra.

114. MX PA/a/1996/006718 - APARATO Y METODO PARA MEJORAR LA PROPORCION DE SEÑAL-A-INTERFERENCIA EN SISTEMAS PARA TRANSMISION DE SOLITON MULTIPLEJADO CON DIVISION DE LONGITUD DEONDA 01.06.1997
H04B 7/00
PA/a/1996/006718 LUCENT TECHNOLOGIESINC. DAVID ANDREW BARCLAY MILLER
Para utilizar en un sistema de transmisión de pulsoóptico de solitón, un aparato para, y método de, incrementar una proporción de señal-a-interferencia del sistema. El aparato incluye:(1) un componente para recibir un solitón y una interferencia de fondo acompañante del sistema e incrementar una densidad de energía del solitón y la interferencia de fondo acompañante y (2) un absorbente saturable, que tiene una velocidad de recombinación predeterminada, para recibir y absorber una porción de solitón y la interferencia de fondo acompañante, la velocidad de recombinación predeterminada provoca que el absorbente saturable, absorba una porción menor del solitón que la interferencia del fondo acompañante, el componente ha incrementado la densidad de energía del solitón y la interferencia de fondo acompañante, para incrementar una sensibilidad del absorbente saturable, el aparato de esta manera incrementa la proporción de señal-a-interferencia del sistema.

115. US 5631758 - Chirped-pulse multiple wavelength telecommunications system 20.05.1997
H04J 14/02
08548537 Lucent Technologies Inc. Knox Wayne H.
An apparatus and method provides optical multiple wavelength signals using a single optical broadband source to generate many independent optical wavelength channels. An optical transmitter includes a pulse chirping device which separates the frequency components of periodic optical pulses in the time domain forming separate wavelength channels which are separately modulated by a high-speed broadband optical modulator. A receiver includes a passive splitter to separate the individual wavelength channels. The chirped-pulse transmitter can then be conveniently adjusted to provide optimum overlap of wavelength channels with the modulating channel spectra.


116. US 5627854 - Saturable bragg reflector 06.05.1997
H01S 3/08
08404664 Lucent Technologies Inc. Knox Wayne H.
Low optical loss and simplified fabrication are achieved by a nonlinear reflector which incorporates one or more semiconductor quantum wells within a standard semiconductor quarter wave stack reflector. The nonlinear reflector provides an intensity dependent response which permits it to be used for saturable absorption directly in a main oscillating cavity of a laser. Saturation intensity of the nonlinear reflector and thereby related laser modelocking properties can be controlled by disposing the quantum well at a particular position in the reflector structure.


117. EP 0771091 - Chirped-pulse multiple wavelength telecommunications system 02.05.1997
H04B 10/155
96307478 AT & T CORP KNOX WAYNE HARVEY
An apparatus and method provides optical multiple wavelength signals using a single optical broadband source to generate many independent optical wavelength channels. An optical transmitter includes a pulse chirping device which separates the frequency components of periodic optical pulses in the time domain forming separate wavelength channels which are separately modulated by a high-speed broadband optical modulator. A receiver includes a passive splitter to separate the individual wavelength channels. The chirped-pulse transmitter can then be conveniently adjusted to provide optimum overlap of wavelength channels with the modulating channel spectra.

118. CA 2183912 - CHIRPED-PULSE MULTIPLE WAVELENGTH COMMUNICATIONS SYSTEM 11.04.1997
H04J 14/02
2183912 KNOX, WAYNE HARVEY
An apparatus and method provides optical multiple wavelength signals using a single optical broadband source to generate many independent optical wavelength channels. An optical transmitter includes a pulse chirping device which separates the frequency components of periodic optical pulses in the time domain forming separate wavelength channels which are separately modulated by a high-speed broadband optical modulator. A receiver includes a passive splitter to separate the individual wavelength channels. The chirped- pulse transmitter can then be conveniently adjusted to provide optimum overlap of wavelength channels with the modulating channel spectra.


119. EP 0732613 - Laser with a saturable Bragg reflector 18.09.1996
G02F 1/35
96301480 AT & T CORP KNOX WAYNE HARVEY
Low optical loss and simplified fabrication are achieved by a nonlinear reflector which incorporates one or more semiconductor quantum wells within a standard semiconductor quarter wave stack reflector. The nonlinear reflector provides an intensity dependent response which permits it to be used for saturable absorption directly in a main oscillating cavity of a laser. Saturation intensity of the nonlinear reflector and thereby related laser modelocking properties can be controlled by disposing the quantum well at a particular position in the reflector structure.

120. CA 2169785 - SATURABLE BRAGG REFLECTOR 16.09.1996
H01S 3/02
2169785 AT&T IPM CORP. KNOX, WAYNE HARVEY
Low optical loss and simplified fabrication are achieved by a nonlinear reflector which incorporates one or more semiconductor quantum wells within a standard semiconductor quarter wave stack reflector. The nonlinear reflector provides an intensity dependent response which permits it to be used for saturable absorption directly in a main oscillating cavity of a laser. Saturation intensity of the nonlinear reflector and thereby related laser modelocking properties can be controlled by disposing the quantum well at a particular position in the reflector structure.


121. US 5526155 - High-density optical wavelength division multiplexing 11.06.1996
H04J 14/00
08151441 AT&T Corp. Knox Wayne H.
The present invention provides an apparatus and method for high-density optical wavelength division multiplexing (WDM) using a single optical source. An optical wavelength division multiplexer in accordance with the present invention includes an optical source providing an optical pulse signal. A wavelength splitter separates the optical pulse signal spectrum into a plurality of channel signals at different wavelengths such that each channel signal may be separately modulated or otherwise processed. A wavelength combiner then recombines the separately modulated channel signals to provide a high-density WDM optical signal particularly well-suited for use in optical circuit interconnection and optical communication network applications. The high-density single-source multiplexer of the present invention may also be conveniently adjusted to align channel signal wavelengths or to compensate for optical fiber dispersion.


122. EP 0704721 - Methods and apparatus for generating and displaying holographic images utilizing a laser pointer 03.04.1996
G03H 1/22
95306627 AT & T CORP BEISSER FRED A
Disclosed are methods and apparatus for generating and displaying a select image (106) utilizing a hand-held device (100) operable to generate a coherent radiation beam and at least one phase mask (200). Each phase mask, having a first side and a second side, includes at least one phase grating (201) fixed thereto. One or more of the phase masks are positioned such that the generated coherent radiation beam from the hand-held device intersects the first side of one or more phase masks, illuminating at least a portion of at least one of the phase gratings to thereby generate an image beam (105) to display the select image (106).

123. US 5436756 - Suppressed photocurrent, quantum well optical modulation device 25.07.1995
G02F 1/03
07954201 AT&T Bell Laboratories Knox Wayne H.
Photocurrent suppression is achieved without deleteriously affecting modulation performance in a surface normal, electro-absorption, quantum well modulator by introducing a sufficient number of non-radiative recombination centers in the quantum well region of the modulator. The presence of the non-radiative recombination centers significantly shortens the lifetime of photogenerated carriers and, thereby, suppresses the photocurrent. Modulation performance characteristics such as contrast ratio are maintained at acceptable levels even though exciton broadening occurs in the quantum wells. The present modulator exhibits a careful balance between defect density in the quantum wells and the acceptable degree of exciton broadening necessary to preserve quantum effects.


124. EP 0654917 - High-density optical wavelength division multiplexing 24.05.1995
G01J 3/00
94308067 AT & T CORP KNOX WAYNE H
Apparatus for high-density optical wavelength division multiplexing (WDM) uses a single optical source (11) providing an optical pulse signal. A wavelength splitter (18) separates the optical pulse signal spectrum into a plurality of channel signals at different wavelengths such that each channel signal may be separately modulated (by 27) or otherwise processed. A wavelength combiner (18) then recombines the separately modulated channel signals to provide a high-density WDM optical signal (30) particularly well-suited for use in optical circuit interconnection and optical communication network applications. The high-density single-source multiplexer may also be conveniently adjusted to align channel signal wavelengths or to compensate for optical fiber dispersion.

125. CA 2132559 - HIGH-DENSITY OPTICAL WAVELENGTH DIVISION MULTIPLEXING 13.05.1995
H04J 14/02
2132559 KNOX, WAYNE HARVEY
The present invention provides an apparatus and method for high-density optical wavelength division multiplexing (WDM) using a single optical source. An optical wavelength division multiplexer in accordance with the present invention includes an optical source providing an optical pulse signal. A wavelength splitter separates the optical pulse signal spectrum into a plurality of channel signals at different wavelengths such that each channel signal may be separately modulated or otherwise processed. A wavelength combiner then recombines the separately modulated channel signals to provide a high-density WDM optical signal particularly well-suited for use in optical circuit interconnection and optical communication network applications. The high-density single-source multiplexer of the present invention may also be conveniently adjusted to align channel signal wavelengths or to compensate for optical fiber dispersion.


126. EP 0637110 - Free standing quantum well structure. 01.02.1995
G02B 5/08
94305364 AT & T CORP KNOX WAYNE HARVEY
Conventional microfabrication techniques in conjunction with the precise growth of layers of single crystalline materials by epitaxial growth techniques allow the creation of electro-optic microstructures which achieve high reflectivity with only few periods of layer pairs. Standard lithographic techniques are utilized to fabricate free-standing quantum wells which are confined on both sides by air, acrylic resin, or vacuum. The quantum wells are fabricated from spatially and compositionally modulated III-V superlattices in which alternate layers of the structures are sacrificed by selective etching. The structures are patterned such that the quantum wells are suspended between support posts.

127. US 5383212 - Free standing quantum well structure 17.01.1995
H01S 3/19
08100531 AT&T Corp. Knox Wayne H.
Conventional microfabrication techniques in conjunction with the precise growth of layers of single crystalline materials by epitaxial growth techniques allow the creation of electro-optic microstructures which achieve high reflectivity with only few periods of layer pairs. Standard lithographic techniques are utilized to fabricate quantum wells which are confined on both sides by air, acrylic resin, or vacuum. The quantum wells are fabricated from spatially and compositionally modulated III-V superlattices in which alternate layers of the structures are sacrificed by selective etching. The structures are patterned such that the quantum wells are suspended between support posts.


128. US 5265109 - Ultrashort optical pulse signals generation 23.11.1993
H01S 3/098
07965473 AT&T Bell Laboratories Knox Wayne H.
Apparatus is disclosed for generating two streams of optical pulse signals having less than 100 femtoseconds of jitter. A Ti:sapphire laser that is self mode locked by using self focusing in the gain medium and a weak HITCI intercavity dye jet for starting generates a first stream of substantially 100 femtosecond pulses. This first stream of optical pulses is split into two parts, one of which is used as a desired stream of optical pulses and the other of which is used to pump an HITCI dye laser synchronously to generate a second desired stream of optical pulses. The pulses of the second stream from the dye laser have durations of about 140 femtoseconds and less than 100 femtoseconds of jitter relative to the pulses of the first stream. Stated differently, if pulses of about 100 femtoseconds duration are used to pump a gain medium which exhibits strong gain saturation, then the pulses which are generated will have less than 100 femtoseconds of jitter relative to the pump pulses provided that the generated pulses have durations which are greater than the pump pulses. In the embodiment disclosed, the laser which is pumped with the first stream of pulses is a HITCI dye laser having a small positive dispersion in its cavity to ensure that the pulses generated by the dye laser pulses remain slightly larger than the pump pulses.


129. EP 0457479 - NONLINEAR EXTERNAL CAVITY MODELOCKED LASER 21.11.1991
H01S 3/108
91304117 AMERICAN TELEPHONE AND TELEGRAPH COMPANY KELLER, URSULA
Modelocking of a solid state laser such as a Ti:Al2O3 laser is achieved by employing an external cavity defined by spatially separated reflective elements wherein at least one of the reflective elements exhibits a nonlinear characteristic in response to an impinging light beam. Exemplary nonlinear reflective elements are described using bulk semiconductor material or semiconductor quantum well structures integrated with a rear reflector such as a stack of quarter-wave thick dielectric or semiconductor material. Tuning control of the nonlinear reflective element may be introduced with temperature control arrangements and with mechanical translation arrangements in conjunction with lateral band gap engineering of the semiconductor material.

130. EP 0437936 - Optical processing using a multilayer heterostructure. 24.07.1991
G02F 1/015
90313207 AT & T CORP GLASS ALASTAIR MALCOLM
An electro-optic medium, useful for image processing, is formed by creating a distribution of deep impurity levels over essentially all the lateral extent of a multilayer heterostructure 20. This treatment renders the heterostructure semi-insulating, and as a consequence, individual image-resolution elements are isolated. Described is an optical system comprising such an electro-optic medium.

131. US 5007059 - Nonlinear external cavity modelocked laser 09.04.1991
H01S 3/098
07523622 AT&T Bell Laboratories Keller Ursula
Modelocking of a solid state laser such as a Ti:Al.sub.2 O.sub.3 laser is achieved by employing an external cavity defined by spatially separated reflective elements wherein at least one of the reflective elements exhibits a nonlinear characteristic in response to an impinging light beam. Exemplary nonlinear reflective elements are described using bulk semiconductor material or semiconductor quantum well structures integrated with a rear reflector such as a stack of quarter-wave thick dielectric or semiconductor material. Tuning control of the nonlinear reflective element may be introduced with temperature control arrangements and with mechanical translation arrangements in conjunction with lateral band gap engineering of the semiconductor material.


132. US 5004325 - Optical processing using a multilayer heterostructure 02.04.1991
G02F 1/017
07465274 AT&T Bell Laboratories Glass Alastair M.
An electro-optic medium, useful for image processing, is formed by creating a distribution of deep impurity levels over essentially all the lateral extent of a multilayer heterostructure. This treatment renders the heterostructure semi-insulating, and as a consequence, individual image-resolution elements are isolated. Described is an optical system comprising such an electro-optic medium.


133. EP 0405802 - Electrooptic apparatus for the measurement of ultrashort electrical signals. 02.01.1991
G01R 13/34
90306550 AT & T CORP KNOX WAYNE H
An electrooptic measuring apparatus having both high voltage sensitivity and femtosecond time resolution comprises coplanar transmission lines fabricated on a semi-insulating multiple quantum well structure. An electrical signal, such as from a high speed electronic device, injected onto the transmission lines creates an electrical field parallel to the layer planes of the multiple quantum well structure. Excitonic electroabsorption by the multiple quantum well structure, in response to the parallel field, changes the transmissivity of the multiple quantum well structure. An external light beam directed through the multiple quantum well structure is modulated by the changes in transmissivity. By detecting this modulation, a sampling of the electrical signal is achieved.

134. CA 2014681 - ELECTROOPTIC APPARATUS FOR THE MEASUREMENT OF ULTRASHORT ELECTRICAL SIGNALS 26.12.1990
G01R 31/308
2014681 KNOX, WAYNE H.
An electrooptic measuring apparatus having both high voltage sensitivity and femtosecond time resolution comprises coplanar transmission linefabricated on a semi-insulating multiple quantum well structure. An electrical signal, such as from a high speed electrooptic device, injected onto the transmission lines creates an electrical field parallel to the layer planes of the multiple quantum well structure. Excitonic electroabsorption by the multiple quantum well structure, in response to the parallel field, changes the transmissivity of the multiple quantum well structure. An external light beam directed through the multiple quantum well structure is modulated by the changes in transmissivity. By detecting this modulation, a sampling of the electrical signal is achieved.


135. US 4978910 - Electrooptic apparatus for the measurement of ultrashort electrical signals 18.12.1990
G01R 15/00
07371475 AT&T Bell Laboratories Knox Wayne H.
An electrooptic measuring apparatus having both high voltage sensitivity and femtosecond time resolution includes coplanar transmission lines fabricated on a semi-insulating multiple quantum well structure. An electrical signal, such as from a high speed electronic device, injected onto the transmission lines creates an electrical field parallel to the layer planes of the multiple quantum well structure. Excitonic electroabsorption by the multiple quantum well structure, in response to the parallel field, changes the transmissivity of the multiple quantum well structure. An external light beam directed through the multiple quantum well structure is modulated by the changes in transmissivity. By detecting this modulation, a sampling of the electrical signal is achieved.


136. US 4413178 - Sweep drive circuit for a streak camera 01.11.1983
G04F 13/00
06246830 University of Rochester Mourou Gerard A.
An inexpensive, simple and highly accurate sweep drive circuit for streak cameras generates a ramp voltage for the deflection plates of an image converter tube of a streak camera. A solid state switch is used in a manner which eliminates the need for a pulsed multi-kilovolt bias voltage and the use of cryogenics. High voltage direct current in the multi-kilovolt range is applied to a charged circuit which may include a high voltage capacitor or use the capacitance presented by the deflection plates of the tube. The switch is laser activated and becomes photo-conducting. The charge in the capacitor passes through a charging resistor which controls the sweep rate to the deflection plates. After the activating laser pulse, the switch returns rapidly to a nonconducting state, during the recombination time of the switch material. The photo-electron beam is swept linearly over a substantial portion of the recombination time from off the image forming phosphor screen to off screen on the other side thereof. A resistor connected to the deflection plates provides a time constant long compared to the transient event lifetime, which may be the fluorescence decay time of the system under study, and the beam remains off the phosphor screen for a very large time compared to the fluorescence decay time. In a second configuration when the deflection plates are used as the charged source, the laser-activated switch is connected between a deflection plate and a point of reference potential (ground) through the charging resistor.




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