Abstract

We report the velocity-selective magnetic-optical activity of a ⁸⁷Rb vapor when the counterpropagating pump and probe beams are linearly cross polarized. A semiconductor laser tuned to the D₂ line (780 nm) is used to perform the experiment. When a weak axial magnetic field is applied to the vapor, the magnetic-optical activity spectrum reveals a narrow dominant peak, the solitary resonance, corresponding to the cycling transition 5S_1/2, F = 2 ↔ 5P_3/2, F = 3. The light-shift origin of this spectrum is discussed.

© 1991 Optical Society of America

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