光腔衰荡法测量高反射率的实验研究  

High Reflectivity Measurement by Cavity Ring-Down Spectroscopy

作　　者：刘蓉[1] 李锋[2] 白晋涛[2] 

机构地区：[1]西安工业大学光电工程学院,陕西西安710032 [2]西北大学光子学与光子技术研究所,陕西西安710069

出　　处：《光学与光电技术》2008年第1期11-14,共4页Optics & Optoelectronic Technology

基　　金：陕西省教育厅专项基金(05JK185);陕西省教育厅产业化培育基金(03JC06)资助项目

摘　　要：基于光腔衰荡光谱技术,建立了以共焦腔为衰荡腔的单波长反射率测量装置,该装置可用于精密测量全固体激光器高反射率腔镜的反射率,检测得到了高反腔镜在946 nm的反射率。实验测得平凹镜和平面镜衰荡时间的平均值分别为1.624μs和821 ns,平凹镜的反射率为99.794%,相对误差精确到10^(-5);平面反射镜的反射率为99.800%,相对误差精确到10^(-4)。结果表明,光腔衰荡法可用于高反射率腔镜反射率的测量,与分光光度计测得的结果相比,具有非常高的测量精度。Based on cavity ring-down spectroscope technology, a single wavelength reflectivity measuring system whose ringdown cavity is confocal cavity is set up. It can accurately determine the reflectivity of a mirror at the wavelength of 946 nm. The average value of ring-down times are 1. 624 μs and 821 ns respectively. The reflectivity of the concave cavity mirrors is to be 99. 794%, relative error achieves to 10^-6, and that of the flat mirror is to be 99. 800%, relative error achieves to 10^-4. The experiment results show that cavity ring-down method can be used in the higher reflectivity experiment, and the metrical precision is higher than the result of spectrophotometer.

关 键 词：光腔衰荡光谱技术 高反射率 测量 共焦腔 

分 类 号：TN249[电子电信—物理电子学]