地基差分吸收激光雷达垂直探测大气压力初步实验

洪光烈1 王钦1,2 王建宇1,2 梁新栋1,2 孔伟1 李虎1,2

(1.中国科学院上海技术物理研究所中国科学院空间主动光电技术重点实验室, 上海 200083)
(2.中国科学院大学, 北京 100049)

【摘要】大气压力是最重要的气象要素之一。为了实现空间激光遥感大气压力,需要先进行必要的地基激光雷达探测实验研究。以单纵模Nd:YAG激光器的二倍频532 nm激光脉冲作为泵浦源,以KTP(KTiOPO4)晶体作为非线性转换介质的光参量振荡器和光参量放大器,产生了760.236 nm和760.307 nm波长的两种激光脉冲,脉冲能量为40 mJ,采用ϕ350 mm望远镜接收大气的后向散射,从而获得了不同高度处与激光雷达之间双波长的差分光学厚度。有效探测高度为500~4000 m,时间分辨率为1~5 min。实验结果表明,差分光学厚度对应着大气层不同高度处与激光雷达间的压力差,其对应关系的数值表达是可以期待的。

【关键词】 遥感; 遥感器; 差分吸收激光雷达; 光参量振荡器; 光参量放大器; 差分光学厚度; 大气压力;

【DOI】

【基金资助】 国家自然科学基金(61775227)

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This Article

ISSN:0258-7025

CN: 31-1339/TN

Vol 47, No. 03, Pages 283-290

March 2020

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Article Outline

摘要

  • 1 引 言
  • 2 差分吸收激光雷达的原理模型
  • 3 差分吸收激光雷达的系统装置与系统实验
  • 4 分析与讨论
  • 5 结 论
  • 参考文献