全天时喇曼激光雷达探测大气水汽的技术实现及分光系统设计

高飞; 雷宁; 黄波; 朱青松; 石冬晨; 汪丽; 王玉峰; 闫庆; 刘晶晶; 华灯鑫

doi:doi:10.3788/gzxb20184704.0401003

光子学报, 2018, 47 (4): 0401003, 网络出版: 2018-03-15

全天时喇曼激光雷达探测大气水汽的技术实现及分光系统设计

Design of Polychromator and Technical Implementation of Daytime Raman Lidar for Atmospheric Water Vapor Measurement

论文大纲

高飞 ^*雷宁黄波朱青松石冬晨汪丽王玉峰闫庆刘晶晶华灯鑫

作者单位

西安理工大学机械与精密仪器工程学院, 西安 710048

喇曼激光雷达大气水汽全天时臭氧吸收光栅光谱仪 Raman lidar Water vapor Daytime Ozone absorption Grating spectrometer

摘要

为实现大气水汽的全天时测量, 选用Nd∶YAG脉冲激光器的四倍频输出266.0 nm作为激励光源, 设计日盲紫外域喇曼激光雷达系统.由于低层大气污染造成的臭氧污染, 通过增加大气氧气的振动喇曼散射信号测量通道, 实时反演近地表臭氧浓度的分布, 为修正激光雷达方程中的臭氧吸收提供解决方案.同时, 选用高光谱分辨率光栅和窄带宽激光反射镜设计光栅光谱仪作为激光雷达的分光系统.仿真计算表明, 入射角为10°时, 设计的光栅光谱仪可有效分离并提取氧气、氮气和水汽的振动喇曼散射回波信号, 日盲紫外喇曼激光雷达系统可实现全天时状态下2 km高度范围内大气水汽的廓线探测.

Abstract

In order to achieve the water vapor measurement in day and night time, the quadruple frequency of Nd∶YAG pulsed laser is selected as the transmitter in the construction of solar-blind Raman lidar. Due to the Ozone pollution in the lower atmosphere, besides the detection of the vibrational Raman signals of nitrogen and water vapor, exmaination of the vibrational Raman signal of oxygen is necessary for retrieving the Ozone concentraiton from the ground to the height of interest, which can be used as the solution for correcting the Raman lidar equation. Meanwhile, the high-resolution grating and tunable laser mirrors are selected to construct the grating spectormeter for the separation of the vibrational Raman signals of oxygen, nitrogen and water vapor. The simulation results show that the vibrational Raman siganls of oxygen, nitorgen and water vapor can be extracted finely when the incident angle of the grating spectrometer is set to be 10 deg, and the solar blind Raman lidar can achieve the water vapor measurement up to the height of 2 km.

参考文献

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高飞, 雷宁, 黄波, 朱青松, 石冬晨, 汪丽, 王玉峰, 闫庆, 刘晶晶, 华灯鑫. 全天时喇曼激光雷达探测大气水汽的技术实现及分光系统设计[J]. 光子学报, 2018, 47(4): 0401003. GAO Fei, LEI Ning, HUANG Bo, ZHU Qing-song, SHI Dong-chen, WANG Li, WANG Yu-feng, YAN Qing, LIU Jing-jing, HUA Deng-xin. Design of Polychromator and Technical Implementation of Daytime Raman Lidar for Atmospheric Water Vapor Measurement[J]. ACTA PHOTONICA SINICA, 2018, 47(4): 0401003.

全天时喇曼激光雷达探测大气水汽的技术实现及分光系统设计

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