研制了一台利用大气后向散射信号探测NO2浓度廓线的差分吸收激光雷达(DIAL)。用两台Nd∶YAG激光器分别抽运两台染料激光器，获得测量大气NO2浓度所需的波长分别为λon和λoff的两束激光，通过数据反演获得NO2浓度的水平和垂直分布。实验结果表明，淮南大气科学研究院内大气垂直高度0.4~3.0 km范围内的NO2体积分数在0~2.5×10-8范围内波动，水平距离0.4~3.0 km范围内的NO2体积分数在0~3.0×10-8范围内波动。

One differential absorption lidar (DIAL) for measuring NO2 concentration profile is developed by using atmospheric backscattered signals. Two Nd∶YAG lasers are used to pump two dye lasers to produce two laser beams with the wavelengths of λon and λoff, respectively. Retrieval of acquired data provides the vertical and the horizontal distributions of NO2 concentration. The experimental results show that the volume fraction of NO2 at Huainan Institute of Atmospheric Sciences, fluctuates in the range from 0 to 2.5×10-8 in the atmospheric vertical height range of 0.4-3.0 km and 0 to 3.0×10-8 in the horizontal distance range of 0.4-3.0 km, respectively.