级联三能级系统中高阶非线性效应的研究(英文)  

NONLINEAR EFFECTS ON CASCADE THREE-LEVEL 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,西安710049

出　　处：《光子学报》2002年第1期55-59,共5页Acta Photonica Sinica

基　　金：the Chinese National Nature Sciences Foundation( Grant No.6 99780 1 9) and the State Key Labora-tory Foundation of Transient Optics Technology( Grant No.YAK2 0 0 0 6 )

摘　　要：本文采用二阶相干函数理论研究了级联三能级系统中三阶及五阶极化拍频 ( TPBCTS及 FPBCTS)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 。Based on the second-order coherence function theory,authors have studied nonlinear effects of third-and fifth-order on polarization beats in a cascade three-level system (TPBCTS and FPBCTS).It can be seen that the different temporal behavior of the beating signal in TPBCTS and FPBCTS depends on the stochastic properties of the lasers and transverse relaxation rate of the transition.The cases that pump beams have either narrowband or broadband line width are considered and it has been found that for both cases an eliminating Doppler broadened free precision can be obtained in measuring energy-level difference.The spatially modulation behavior of the beat signal has also been shown.

关 键 词：非线性效应 极化拍频 级联三能级系统 激光 信号分析 原子 

分 类 号：O562[理学—原子与分子物理] TN24[理学—物理]