中国空间科学技术

中国空间科学技术 ›› 2023, Vol. 43 ›› Issue (6): 150-159.doi: 10.16708/j.cnki.1000-758X.2023.0094

• 陆地生态系统碳监测卫星专栏 • 上一篇    

基于星载双波长偏振探测的大气探测激光雷达系统设计

赵一鸣，李飞，潘超，李静，于勇，李凉海   

  1. 北京遥测技术研究所，北京100094
  • 出版日期:2023-12-25 发布日期:2023-12-12

Design of space-borne atmospheric detection lidar based on dual-wavelength polarization detection

ZHAO Yiming，LI Fei，PAN Chao，LI Jing，YU Yong，LI Lianghai   

  1. Beijing Research Institute of Telemetry，Beijing 100094，China
  • Published:2023-12-25 Online:2023-12-12

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摘要： 为获取全球大气气溶胶的垂直分布，解决现有大气环境监测受地域限制的难题，提出了星载大气探测激光雷达系统。该系统工作于卫星平台，采用双波长532nm、1064nm激光作为探测光源，结合偏振探测方式，获取大气气溶胶、云的垂直分布、粒子形状、粒子大小信息，实现了全球范围内大气的全天时、立体观测，弥补大气环境监测体系的不足。星载大气探测激光雷达系统提出自洽谐振腔的激光器发射技术，解决了星载大能量双波长激光器长期高效工作难题，实现双波长激光输出能量110mJ；提出了空间平腔标准具滤波技术，解决了空间环境大气回波高效滤波和在轨滤波带宽与激光带宽匹配难题，实现滤波带宽40pm；提出了空间高精度激光指向调整技术，实现指向调整精度优于5μrad。通过研制星载大气探测激光雷达系统对大气气溶胶进行探测，获取15km高度以内的大气垂直廓线，有效识别大气层中底层气溶胶、中层的云以及高空的大气分子的形态和演变过程。

关键词: 星载, 大气, 双波长, 偏振, 激光雷达

Abstract: To obtain atmospheric profile of the whole world，and solve the problem that environment monitor was always restricted to a certain area，a spaceborne atmospheric detection lidar was designed.This lidar working on satellite uses a 532nm and 1064nm dual-wavelength laser combined with polarization detection method to obtain profile，particle size，particle shape of aerosol and cloud，and can research the requirement of three-dimensional spatial distribution detection of clouds and aerosols around the world which will improve atmospheric monitoring system.The space-borne atmospheric detection lidar used ultra-stable laser resonator to get 110mJ laser output，and used space-borne plane etalon to get 40pm filter bandwidth，and used high-precision pointing controller that pointing accuracy of laser beam was less than 5μrad.Finally，the paper gives test data of atmospheric vertical profiles under 15km attitude obtained by a space-borne atmospheric detection lidar which shows dominant position of the lidar on atmospheric detection.

Key words: space-borne, atmosphere, dual-wavelength, polarization, lidar