Abstract
We have studied the nonstationary effects in saturated absorption spectroscopy of the 87Rb D2 line. Varying the size of the σ+ polarized pump laser beam, we observed saturated absorption spectra for the σ± polarized probe beam. For equal polarizations of the pump and probe beams, we found that the resonance signal for the Fg=1→Fe=2 line, and the crossover lines between Fg=1→Fe=2 and Fg=1→Fe=1 (and 0) lines increased to a greater extent than the others. This observation can be understood from the calculated time evolution of the populations of the ground-state sublevels by means of a rate equation model. We also compared experimental data for other conditions with the calculated results. We found good agreement between the calculated results and the data.
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