中间场下铷532nm法拉第滤光器传输特性分析  

Analyses of Transmission Characteristics of Rubidium Faraday Optical Filter at 532 nm in Intermediate Fields

作　　者：彭玉峰[1] 张文晋[1] 程祖海[2] 

机构地区：[1]河南师范大学物理与信息工程学院,河南新乡453007 [2]华中科技大学激光技术国家重点实验室,湖北武汉430074

出　　处：《光学学报》2009年第7期1778-1783,共6页Acta Optica Sinica

基　　金：国家973计划(5132802)资助项目

摘　　要：对工作在铷5P1/2→10S1/2 (532 nm)跃迁的法拉第反常色散滤光器的传输特性,并对中间场下激发态法拉第反常色散滤光器的理论模型进行了分析与讨论。依据量子力学微扰理论和量子跃迁理论,给予了完整地描述。理论分析结果表明,在气室温度434 K,磁场强度0.067 T,抽运光强度20 w/m2,气室长度0.1 m条件下,法拉第反常色散滤光器处于一个最佳工作状态;期望的线芯工作方式得以实现,中心透射峰适宜作滤光器的信号光通道。理论模型预测滤光器的峰值透过率接近50%,等效带宽仅为2.6 GHz。铷532 nm激发态法拉第反常色散滤光器的光谱特性可用于检测具有重要应用价值的二倍频Nd:YAG激光信号。The transmission characteristics of an excited-state Faraday anomalous dispersion optical filter （ESFADOF） operating on the 5P1/2→10S1/2（532nm） transition （532 nm） in a rubidium vapor cell are analyzed and discussed theoretically. The theoretical model of ESFADOF based on quantum-mechanical perturbation theory and quantum transition theory in the intermediate field is presented. The theoretical results show that the vapor cell operates in an optimal working condition when the laser pump intensity is 20 W/m^2 and the rubidium cell （0. 1 m in length） temperature is 434 K in an axial magnetic strength of 0. 067 T, and the anticipated performance in the line-center operation has been obtained. The transmission spectrum with a higher transmission peak in the line center that is more suitable for a signal light channel is shown. This model predicts that a peak transmission is near to 50% with an equivalent bandwidth of only 2.6 GHz. The spectral properties of the presented Rb-ESFADOF at 532 nm may be used to detect the practical and important frequency-doubled Nd：YAG laser. effect; atomic filter

关 键 词：原子与分子物理学 反常色散光谱 磁光效应 原子滤光器 

分 类 号：O562.3[理学—原子与分子物理]