差分吸收NO_2激光雷达光源的设计与实现
Design and implementation of NO_2 differential absorption lidar sources
查看参考文献20篇
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文摘
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为研制一台探测距离3km、分辨率10μg /m~3的大气NO_2廓线差分吸收激光雷达,以NO_2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、NO_2含量的分布、探测距离和几何因子的关系;搭建探测大气NO_2实验系统,开展了大气NO_2浓度实验观测,获得水平及垂直高度0.4km ~ 3.0km内的NO_2浓度实时分布,探测分辨率可达4.717μg /m~3 ,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λ_(on)( 448.10nm)和λ_(off)( 446.80nm) 、能量为8mJ的输出光束。该方法为实用化NO_2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。 |
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其他语种文摘
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To develop an atmospheric NO_2 differential absorption lidar ( DIAL) with detection range of 3km and resolution of 10μg /m~3 ,based on NO_2 absorption spectrum and lidar equation,the relationships among echo signal-to-noise ratio ( SNR) , aerosol of the horizontal and vertical direction,NO_2 concentration,detection distance and geometric factor were analyzed and simulated. The atmospheric NO_2 experiment system was built,and the atmospheric NO_2 concentration experiment was carried out. The NO_2 concentration in horizontal and vertical height of 0.4km ~ 3.0km was obtained in real time,and the resolution was up to 4.717μg /m~3 . 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 λ_(on) of 448.10nm,λ_(off) of 446.80nm,and energy of 8mJ. This method provides theoretical basis and technical support for the design and application of practical NO_2 differential absorption lidar light sources. |
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来源
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激光技术
,2018,42(4):433-439 【扩展库】
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DOI
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10.7510/jgjs.issn.1001-3806.2018.04.001
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关键词
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大气光学
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差分吸收激光雷达
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二氧化氮
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波长和能量
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地址
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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, 合肥, 230031
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中国科学技术大学, 合肥, 230026
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韩山师范学院物理与电子工程学院, 潮州, 521041
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-3806 |
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学科
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电子技术、通信技术 |
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基金
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国家自然科学基金委国家重大科研仪器设备研制专项
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国家自然科学基金资助项目
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文献收藏号
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CSCD:6286787
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