激光技术, 2018, 42 (4): 433, 网络出版: 2018-08-29   

差分吸收NO2激光雷达光源的设计与实现

Design and implementation of NO2 differential absorption lidar sources
作者单位
1 中国科学院 安徽光学精密机械研究所 大气光学重点实验室, 合肥 230031
2 中国科学技术大学, 合肥230026
3 韩山师范学院 物理与电子工程学院, 潮州 521041
摘要
为研制一台探测距离3km、分辨率10μg/m3的大气NO2廓线差分吸收激光雷达, 以NO2的吸收光谱和激光雷达方程为基础, 通过数值仿真分析了回波信噪比与水平和垂直方向上大气中气溶胶、NO2含量的分布、探测距离和几何因子的关系; 搭建探测大气NO2实验系统, 开展了大气NO2浓度实验观测, 获得水平及垂直高度0.4km~3.0km内的NO2浓度实时分布, 探测分辨率可达4.717μg/m3, 系统稳定可靠。结果表明, 采用两台波长为354.7nm、能量不小于100mJ的Nd∶YAG激光器分别抽运两台染料激光器的方式, 并以C450为染料, 可满足差分吸收探测所需的两束波长为λon (448.10nm)和λoff (446.80nm)、能量为8mJ的输出光束。该方法为实用化NO2差分吸收激光雷达光源的设计及应用提供了理论依据及技术支持。
Abstract
To develop an atmospheric NO2 differential absorption lidar (DIAL) with detection range of 3km and resolution of 10μg/m3, based on NO2 absorption spectrum and lidar equation, the relationships among echo signal-to-noise ratio (SNR) , aerosol of the horizontal and vertical direction, NO2 concentration, detection distance and geometric factor were analyzed and simulated. The atmospheric NO2 experiment system was built, and the atmospheric NO2 concentration experiment was carried out. The NO2 concentration in horizontal and vertical height of 0.4km~3.0km was obtained in real time, and the resolution was up to 4.717μg/m3. The system was stable and reliable. The results show that, with two Nd∶YAG lasers with wavelength of 354.7nm and laser energy not less than 100mJ to pump two dye lasers with C450 as the dye, two output light beams for differential absorption detection can be obtained with λon of 448.10nm, λoff of 446.80nm, and energy of 8mJ. This method provides theoretical basis and technical support for the design and application of practical NO2 differential absorption lidar light sources.

刘秋武, 陈亚峰, 王杰, 王晓宾, 曹开法, 黄见, 胡顺星. 差分吸收NO2激光雷达光源的设计与实现[J]. 激光技术, 2018, 42(4): 433. LIU Qiuwu, CHEN Yafeng, WANG Jie, WANG Xiaobing, CAO Kaifa, HUANG Jian, HU Shunxing. Design and implementation of NO2 differential absorption lidar sources[J]. Laser Technology, 2018, 42(4): 433.

本文已被 3 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!