级联三能级系统混沌模型下的五阶非线性效应

Nonlinear Effects of Fifth-order on Polarization Beats of a Cascade Three-level System in Chaos-field

本文采用四阶相关函数理论研究了级联三能级系统混沌模型下的五阶非线性效应。通过对泵浦光为宽带及窄带情形的分析 ,发现五阶极化拍频信号的强度随时间的变化取决于激光的统计特性和跃迁的横向驰豫率 ,从而在测量原子能级分裂时可以得到消除多普勒极限增宽的精度。另外 。

The fourth order coherence function theory has been applyed to study the nonlinear effects of fifth order on polarization beats of a cascade three level system in chaos field.By analyzed the cases that pump beams have either narrowband or broadband linewidth,we found that for both cases the beat signal of the different temporal behavior depends on the stochastic properties of the lasers and transverse relaxation rate of the transition.We also found that a Doppler free precision can be achieved in the measurement of the energy level difference.The spatial modulation behavior of the beat signal has also been discussed.