532nm法拉第光学滤波器传输特性  

Transmission Properties of Faraday Anomalous Dispersion Optical Filter at 532 nm

作　　者：彭玉峰[1] 程祖海[1] 丘军林[2] 汤俊雄[3] 郑乐民[3] 

机构地区：[1]华中理工大学激光技术国家重点实验室,武汉430074 [2]河南师范大学物理系,新乡453002 [3]北京大学电子系学,北京100871

出　　处：《光谱学与光谱分析》2001年第3期294-295,共2页Spectroscopy and Spectral Analysis

基　　金：河南省科委自然科学基金资助项目

摘　　要：本文对工作在波长为 5 32 33nm的激发态钾 (K)原子法拉第光学滤波器进行了分析与讨论。结果表明 :这种工作在钾 4P1/ 2 ← 8S1/ 2 跃迁谱线的滤波器的峰值透过率为 5 0 % ,等效带宽为 4GHz。同时滤波器的传输特性跟激光泵浦功率以及外加磁场强度并不是线性相关 ;所需激光泵浦功率的范围为 0 8～ 6mW·cm-2 。In this paper the properties of an excited-state potassium Faraday anomalous dispersion optical filter in potassium vapor with a pump wavelength of 769.90 nm(i.e. 4S(1/2) --> 4P(1/2) transition) and a signal wavelength of 532 nm (i.e. 4P(1/2) --> 8S(1/2) transition)are calculated and discussed. The filter's transmissions versus the laser pump power and the external magnetic-field are obtained. The theoretical results show the transmission characteristics of the filter are relatively insensitive to the laser pump power and magnetic strength. The laser pump powers require range from 0.8 to 6 mW.cm(-2). Our model predicts a peak transmission of 50% and an equivalent bandwidth of 4 GHz for the filter operating on the 4P(1/2) <-- 8S(1/2) transition in potassium. The optical filter at 532 rim presented in this paper may be used to detect the practical and important frequency-doubled Nd: YAG laser.

关 键 词：原子滤波器 法拉第旋光效应 反常色散 532nm法拉第光学滤波器 传输特性 

分 类 号：TN713[电子电信—电路与系统]