差分吸收激光雷达是探测对流层臭氧分布的一种先进工具。研制了一套车载差分激光雷达系统，系统基于NdYAG四倍频激光和拉曼频移技术产生紫外差分光源，并采用卡塞格林(Cassegrain)型望远镜，利用光栅光谱仪分离四波长的回波信号，使用光子计数和模拟采集相融合的方式采集数据。讨论分析了系统的测量精度并与臭氧探空仪进行了对比验证实验。实验结果表明，两台仪器测量的对流层臭氧具有很好的一致性，证实了车载差分吸收激光雷达系统及臭氧浓度分析软件的可靠性。

The differential absorption lidar is an advanced instrument for monitoring atmospheric ozone concentration profile. A new vehicle differential absorption lidar is developed. The lidar system emits four wavelengths ultraviolet laser based on a frequency quadrupled NdYAG laser and Raman shifting technique. A Cassegrain telescope is used and the grating spectrometer is used to separate the backscatter signals of the four emited wavelengths. The data is collected by photon counting and analog acquisition integration mode. The accuracy of measurement system is discussed and analyzed. The lidar system and ozonesonde under took experiments at the same time. Experimental results show that tropospheric ozone profiles derived from lidar and ozonesonde are in good agreement, suggesting that the vehicle differential absorption lidar system and ozone concentration analysis software are reliable.