一种高线色散率测温激光雷达双光栅光谱仪  

A Temperature Measuring Lidar Double Gratings Spectrometer with High Linear Dispersion

作　　者：刘洋 张天舒[1] 赵雪松 钟刘军 付毅宾 陈臻懿 董云生 范广强 Liu Yangl,2, Zhang Tianshu1, Zhao Xuesong1, Zhong Liujun1, Fu Yibin1,Chen Zhenyi1, Dong Yunsheng1, Fan Guangqiang1(1.Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China ;2 University of Science and Technology of China, Hefei, Anhui 230036, China)

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽合肥230031 [2]中国科学技术大学,安徽合肥230036

出　　处：《中国激光》2018年第9期154-158,共5页Chinese Journal of Lasers

基　　金：国家重点研发计划(2017YFC0804900);国家重点基础研究发展计划(2014CB447900)

摘　　要：与目前广泛应用的532nm波段的发射波长相比,采用355nm波段发射波长进行大气温度观测对分光光谱仪的精度要求更高,分光光谱仪的线色散率要达到0.1nm/mm。提出了一种新型高线色散率纯转动拉曼激光雷达分光光谱仪,通过设计双光栅结构来达到激光雷达纯转动拉曼回波信号分光的目的。利用Zemax软件进行设计,模拟分析结果显示:间隔0.1nm的两个相邻光谱在分光光谱仪聚焦镜焦平面处两个相邻谱线中心可以分开1mm,满足测温纯转动拉曼分光光谱仪线色散率达到0.1nm/mm的要求。将实验得到的斯托克斯回波信号强度与理论计算结果进行对比,验证了纯转动拉曼雷达中应用双光栅光谱仪的可行性。Compared with the widely used emission wavelength of 532 nm,the atmospheric temperature observation using the emission wavelength of 355 nm requires higher precision of the spectroscopic spectrometer,and the line dispersion rate of the spectroscopic spectrometer should reach 0.1 nm/mm.A new high linear dispersion pure rotational Raman laser lidar spectrophotometer is proposed,which uses the double grating structure to achieve the purpose of laser lidar pure rotational Raman echo signal separation.Zemax software is used to design,simulation results show that the interval of 0.1 nm in two adjacent spectrum spectral optical system focus lens focal plane in the center of two adjacent line can be separated from 1 mm,which satisfies the requirement of line dispersion rate of temperature measuring pure rotational Raman spectroscopic spectrometer to reach 0.1 nm/mm.Comparing the experimental Stokes echo signal strength with theoretical calculation,the feasibility of the double grating spectrometer in the pure rotational Raman lidar is verified.

关 键 词：光谱学 测温激光雷达 纯转动拉曼光谱 双光栅光谱仪 线色散率 

分 类 号：TN959.6[电子电信—信号与信息处理]