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差分吸收激光雷达是测量边界层臭氧空间分布的一种重要工具。研制了一台边界层臭氧差分吸收激光雷达系统,系统采用Nd:YAG四倍频激光266 nm泵浦H2/D2混合气体产生受激拉曼光作为光源,采用牛顿型望远镜接收大气回波,288.9 nm和299 nm的弹性散射信号被分成两路,被光电倍增管转换为电信号,然后通过A/D采集卡采集保存用以反演大气臭氧分布廓线。给出了系统的探测结果以及和臭氧探空仪地对比验证实验。结果显示该激光雷达可以大大降低几何因子的影响,提供0.2~2 km区间的边界层大气臭氧分布廓线。
Differential absorption lidars are an important tool for measuring the spatial distribution of ozone in the boundary layer. A boundary layer ozone differential absorption lidar system was developed. The system uses stimulated Raman light generated by 266 nm pumping H2 / D2 mixed Nd: YAG laser as the light source and receives atmospheric echo with Newton type telescope. 288.9 The elastic scattering signals of nm and 299 nm are divided into two paths and converted into electrical signals by the photomultiplier tubes. The signals are collected and saved by the A / D acquisition card to retrieve the profiles of atmospheric ozone profiles. The results of the system detection and the contrast verification experiment with the Ozone Sounder are given. The results show that the lidar can greatly reduce the influence of geometric factors and provide the atmospheric ozone profiles in the boundary layer of 0.2 ~ 2 km.