Experimental study of power broadening in a two-level atom

M. L. Citron, H. R. Gray, C. W. Gabel, and C. R. Stroud, Jr.

Phys. Rev. A 16, 1507 (1977).

As a test of the theory of power broadening in a two-level atom, a system closely approximating a two-level atom was prepared by using a frequency-stabilized cw dye laser to optically pump sodium atoms in an atomic beam into the F=2, M_F=2 ground state, and a second laser to couple this level to the ³P_3/2 F=3, M_F=3 excited state. The resulting line shape was accurately Lorentzian over a large range of incident field strengths, and the power broadening and saturation at resonance were also in accord with the theory.

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