基于连续激光器的侧向拉曼散射激光雷达无盲区探测大气温度技术  

Non-Blind Zone Detection of Atmospheric Temperature Using Lateral Raman Scattering Lidar Based on Continuous-Wave Laser

作　　者：杨帆[1] 高飞[1] 高雄 李晓莉 汪丽[1] 闫庆[1] 石冬晨 宋跃辉[1] 李仕春[1] 华灯鑫[1] Yang Fan;Gao Fei;Gao Xiong;Li Xiaoli;Wang Li;Yan Qing;Shi Dongchen;Song Yuehui;Li Shichun;Hua Dengxin(School of Mechanical and Precision Instrument Engineering,Xi'an University of Technology,Xi'an 710048,Shaanxi,China)

机构地区：[1]西安理工大学机械与精密仪器工程学院,陕西西安710048

出　　处：《光学学报》2024年第6期165-174,共10页Acta Optica Sinica

基　　金：国家自然科学基金(42175149,42275148);陕西省自然科学基金(2023JCQN0308);陕西省教育厅科研计划项目(23JY055);西安理工大学博士创新基金(310-252072205)。

摘　　要：提出一种新型的侧向纯转动拉曼散射激光雷达探测技术,其采用双基地的收发系统结构,利用侧向接收系统的俯仰扫描功能实现对与温度具有相反依存关系的高低量子数的侧向纯转动拉曼散射光谱的探测,该技术为从地表到特定高度大气温度的无盲区探测提供了技术支持。侧向纯转动拉曼散射激光雷达的初步观测实验采用整段等距离分辨率和分段等距离分辨率两种云台转动方案,反演结果表明侧向纯转动拉曼散射激光雷达可实现1400 m高度范围内大气温度的精细探测,且分段等距离分辨率云台转动方案在近地表312 m高度范围内能够获得更为精细的大气温度空间分布特征。Objective Pure rotational Raman scattering lidar is an important remote sensing tool for atmospheric temperature measurement.However,traditional backward pure rotational Raman scattering lidar has limitations in achieving effective atmospheric temperature detection in the lower atmosphere due to the overlap function effect of lidar systems.We present a novel technique of lateral scanning pure rotational Raman scattering lidar for accurate measurement of atmospheric temperature without the influence of blind zones and transition zones,which employs the bistatic structure of lidar systems.The atmospheric temperature profiling is realized by the detection of high-and low-quantum-number transitions of lateral pure rotational Raman scattering spectra at different heights,which is performed by elevation angle scanning of the lateral receiver system.The biggest advantage of this technique is the utilization of continuous-wave lasers as the excitation source,which not only significantly reduces equipment costs but also facilitates convenient mobility for outdoor observations.Methods The lateral pure rotational Raman scattering lidar technique is studied in the accurate measurement applications of atmospheric temperature from the ground to the height of interest.First,a novel lateral scanning pure rotational Raman scattering lidar technique is proposed and systematically designed.Each telescope combined with a narrow-band interferometric filter is adopted to detect the lateral scattering signals of the low-and high-quantum-number transitions of pure rotational Raman scattering spectra.Then,the atmospheric temperature inversion algorithm for lateral scanning pure rotational Raman scattering lidar is established and the calibration function is optimized to improve the inversion accuracy of atmospheric temperature.Finally,the experimental system is constructed,and the preliminary experiments are conducted using the lateral scanning pure rotational Raman scattering lidar.Two different rotation schemes including the continuous

关 键 词：大气光学 激光雷达 近地表大气温度 侧向纯转动拉曼散射 无盲区探测 俯仰扫描 

分 类 号：TN958.98[电子电信—信号与信息处理]