大气与环境光学学报, 2013, 8 (4): 314, 网络出版: 2013-08-01  

基于ZEMAX的拉曼激光雷达几何因子的模拟分析

Simulation and Analysis of Raman Lidar Geometric Factor by ZEMAX
作者单位
中国海洋大学海洋遥感研究所, 山东 青岛 266003
摘要
激光雷达在接收大气回波信号时,近场信号由于望远镜视场角的限制不能完全接收,这对于侧重于接 收大气对流层信号的拉曼激光雷达是不利的。激光雷达方程引入几何因子的概念描述回波信号的接 收效率。从几何光学的角度,对拉曼激光雷达的几何因子进行了分析,对比光线追迹法求解的几何因 子,两者重合度很高。为提高光纤耦合拉曼激光雷达在近场的接收效率,研究了光纤在轴向和侧 向上的位移对接收效率的影响,并提出了侧向偏移光纤与以往传统的倾斜望远镜在提高近场回波信 号上的一致性,有效地提高了窄视场角拉曼激光雷达系统的光学接收效率。
Abstract
Due to the limitation of a lidar’s field of view, the near-field signals cannot be completely received by telescopes as receiving atmospheric echo signals. This is negative for a Raman lidar which focuses its detection area on the troposphere. The geometric factor was introduced to the lidar equation and was detailed theoretically analyzed in the view of geometrical optics. For comparison, ray tracing method was also used to solve the overlap problem. They turn out a high degree of coincidence. In order to improve the efficiency of receiving near-field echo signals of a fiber-coupled Raman lidar, the effect of the optical fiber in the axial and lateral displacement was researched. In addition, the method of lateral shifted fiber and the laser axis inclination are proved the same influence in receiving the near field echo signals. The results are especially meaningful for a smaller FOV Raman lidar system.

许梦圆, 宋小全, 吴松华. 基于ZEMAX的拉曼激光雷达几何因子的模拟分析[J]. 大气与环境光学学报, 2013, 8(4): 314. XU Meng-yuan, SONG Xiao-quan, WU Song-hua. Simulation and Analysis of Raman Lidar Geometric Factor by ZEMAX[J]. Journal of Atmospheric and Environmental Optics, 2013, 8(4): 314.

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