差分吸收激光雷达系统探测背景大气SO2和NO2  

Differential Absorption Lidar System for Background Atmospheric SO_2 and NO_2 Measurements

作　　者：胡顺星[1] 陈亚峰 刘秋武[1,2] 孙培育 黄见[1] 杨杰 王杰 刘琳琳 Hu Shunxing1, Chen Yafeng1,2, Liu Qiuwu1,2, Sun Peiyu1,2, Huang Jian1, Yang Jie1,2, Wang Jie1,2, Liu Linlin1,2(1. Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences Hefei, Anhui 230031, China; 2University of Science and Technology, of China,Hefei,Anhui 230026,China)

机构地区：[1]中国科学院安徽光学精密机械研究所中国科学院大气光学重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026

出　　处：《中国激光》2018年第9期113-118,共6页Chinese Journal of Lasers

基　　金：国家重大科研仪器设备研制专项(41127901); 国家自然科学基金(41575032,41505019)

摘　　要：研制了一套可用于探测背景大气SO_2和NO_2的差分吸收激光雷达系统。该系统利用两台Nd…YAG激光器的二倍频和三倍频产生532nm/355nm的激光,分别去抽运四台窄线宽的染料激光器,从而获得测量大气SO_2和NO_2分布所需的两对激光波长300.05nm/301.5nm和446.6nm/448.1nm。实验数据表明,在晴朗的天气条件下,当空间分辨率为15 m且积分时间为30 min时,大气SO_2和NO_2的测量精度分别可达±2.0×10^(-9)和±5.0×10^(-9),激光雷达探测的大气SO_2和NO_2平均浓度与当地气象部门同时间报告的浓度较一致,显示了差分吸收激光雷达技术监测低浓度SO_2和NO_2时空分布的能力。A differential absorption lidar（DIAL）system has been developed for background atmospheric SO2 and NO2 measurements.Second harmonic and third harmonic（532 nm/355 nm）of two NdYAG lasers are used to pump four dye lasers,respectively.Two pairs of laser beams 300.05 nm/301.5 nm and 446.6 nm/448.1 nm are obtained for profiling atmospheric SO2 and NO2.Observation results show that accuracies of atmospheric SO2 and NO2 measurements under clear weather condition can be within±2.0×10^-9 and ±5.0×10^-9,respectively,when spatial resolution is set to 15 mand integration time is seted to 30 minutes.Averaged atmospheric SO2 and NO2 concentrations observed through SO2/NO2 DIAL conform with the results of meteorological department at the same time.It shows that DIAL technique has the ability to measure the space-time distribution of low concentration of SO2 and NO2.

关 键 词：光谱学 光学遥感 染料激光光源 差分吸收激光雷达 大气SO2 大气NO2 

分 类 号：P412.291[天文地球—大气科学及气象学]