四能级系统极化拍频的不对称特性

ASYMMETRIC BEHAVIOR OF THE POLARIZATION BEATS SIGNAL IN A FOUR LEVEL SYSTEM 

在泵光为窄带或宽带的情形下，对四能级系统中极化拍频的不对称特性进行了研究。

Abstract We have studied the asymmetric behavior of the polarization beats in a four level system when the pump beams have either narrowband or broadband linewidth, we attribute this asymmetry to the shift of the zero time delay which is due to the dispersion of the optical components.