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266.0nm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2km高度范围内大气水汽的廓线探测.
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.
作者
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
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(School of Mechanical and Precision Instrument Engineering, Xi＇an University of Technology, Xi＇an 710048, Chin)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2018年第4期204-212,共9页
Acta Photonica Sinica
基金
国家自然科学基金(Nos.41775035
41627807
41305023)
中国博士后基金(No.2014M560799)
陕西省科技计划项目(Nos.2014KJXX-64
2014JQ5174)资助~~
