Intensity Dependence of Cesium D_(2)-Line Saturation Spectra

The intensity dependence of the cesium D_(2)-line saturation absorption spectra in a nearly zero magnetic field was investigated theoretically and experimentally.By using rate equations the D_(2)-line saturation absorption spectra were calculated,which agree reasonably well with the experimental results.The variation of the spectra with different cell lengths was also reported and explained with theoretical calculation.