CRDS技术精确测量单波长高反射率  

High Reflectivity Measurement Based on CRDS Technology

作　　者：刘蓉[1] 李欣[2] 白晋涛[3] 

机构地区：[1]西安工业大学光电工程学院,西安710032 [2]西安供电局,西安710032 [3]西北大学光子学与光子技术研究所,西安710069

出　　处：《西安工业大学学报》2010年第6期524-527,共4页Journal of Xi’an Technological University

基　　金：陕西省教育厅专项基金项目(05JK185)

摘　　要：激光腔镜的反射率对激光输出功率和转换效率有极大影响.为了实现高反射率的精确检测,设计并建立了一套脉冲CRDS技术测量单波长高反射率的实验装置.通过比较实验测试曲线,确定以共焦腔为衰荡腔,精确检测了高反射镜在946 nm的反射率.实验结果表明:测得平凹镜和平面镜衰荡时间的平均值分别为1.612μs和819 ns;平凹镜的反射率平均值为99.7934%,相对误差精确到10-5;平面反射镜的反射率为99.7997%,相对误差精确到10-4.The reflectivity of cavity mirrors has a great influence on output power and conversion efficiency of laser.Based on pulsed cavity ring-down spectroscope（CRDS） technology,a single wavelength reflectivity measuring system is set up.Through the comparision between the testing curves,the confocal cavity is chosen as the ring-down cavity.The system could accurately determine the reflectivity of a mirror at the wavelength of 946 nm.The results show that the measured average values of the ring down time of the concave mirrors and the flat mirrors are 1.612 μs and 819 ns respectively.The average value of reflectivity of the concave cavity mirrors is to be 99.7934%,with the relative error accurate to 10-5;and that of the flat mirror is to be 99.7997%,with relative error accurate to 10-4.

关 键 词：CRDS技术 高反射率 共焦腔 OPO激光器 

分 类 号：TN247[电子电信—物理电子学]