Abstract
By employing a Doppler-free saturation spectroscopic method, absorption lines for the left and the right circular polarizations have been measured simultaneously at the sodium D1 line that was pumped by a circularly polarized beam. These experimental results are compared with theoretical results obtained with the velocity-selective optical pumping effect in a four-level atomic system. The effects of the pump-beam intensity on the signal spectra are also investigated.
© 1991 Optical Society of America
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