V型三能级系统中高阶非线性效应的研究  

NONLINEAR EFFECTS ON V-TYPE THREE-LEVEL SYSTEM POLARIZATION BEATS

作　　者：李院院 张彦鹏[2] 甘琛利[2] 

机构地区：[1]宁夏固原师专物理系,宁夏固原756000 [2]西安交通大学电子科学与技术系,西安710049

出　　处：《光子学报》2001年第10期1205-1209,共5页Acta Photonica Sinica

基　　金：国家自然科学基金 (699780 1 9);瞬态光学国家重点实验室基金资助项目 (YAK2 0 0 0 6)

摘　　要：本文采用二阶相干函数理论研究了 V型三能级系统中三阶及五阶极化拍频 ( TPBVTS及 FPBVTS)的非线性效应 .通过对泵浦光为宽带及窄带情形的分析 ,我们发现三阶及五阶极化拍频信号的强度在时域内的变化取决于激光的统计特性和跃迁的横向弛豫率 ,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 ,我们对信号的空间调制也进行了分析 .The second order coherence function theory has been employed in the paper to study the nonlinear effects of third and fifth order on polarization beats in a V type three level system (TPBVTS and FPBVTS).By analyzed the cases that pump beams have either narrowband or broadband linewidth,authors found that for both cases the beat signal in TPBVTS and FPBVTS of the different temporal behavior depends on the stochastic properties of the lasers and transverse relaxation rate of the transition.Authors 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.

关 键 词：高阶非线性效应 极化拍频 V型三能级系统 二阶相干函数 原子物理学 量子拍频技术 

分 类 号：O562.32[理学—原子与分子物理] O437[理学—物理]