全光纤分光转动拉曼测温激光雷达探测性能优化

发布时间：2018-06-06 10:55

本文选题：转动拉曼激光雷达 + 全光纤分光系统　；参考：《西安理工大学学报》2014年04期

【摘要】：采用光纤Bragg光栅的耦合模理论和转动拉曼激光雷达的温度反演算法,优化全光纤分光转动拉曼测温激光雷达系统的探测性能。以光纤Bragg光栅高斯型谱为基础,构建以光纤Bragg光栅为核心的全光纤分光系统的参数优化模型,以1.5km高度处大气温度的统计误差为优化目标进行仿真分析,得到光纤Bragg光栅的中心波长和半峰值带宽的优化值;为了使均匀光纤Bragg光栅的光谱旁瓣与大气分子的纯转动拉曼谱线匹配,局部优化光纤Bragg光栅的Bragg波长、平均折射率变化和光栅长度等结构参数,以构建光纤Bragg光栅加工系统及设置初始加工参数。结合望远镜耦合效率的仿真结果,分析了全光纤分光转动拉曼激光雷达的探测性能。仿真结果表明,全光纤分光转动拉曼激光雷达系统在高度1.5km处的统计温度误差可达1.3K。
[Abstract]:Based on the coupled mode theory of fiber Bragg grating and the temperature inversion algorithm of rotational Raman lidar, the detection performance of all-fiber optical split-light rotating Raman temperature measuring lidar system is optimized. Based on the Gao Si spectrum of fiber Bragg grating, the parameter optimization model of all optical fiber splitting system with fiber Bragg grating as the core is constructed, and the statistical error of atmospheric temperature at 1.5km height is taken as the optimization objective to be simulated and analyzed. In order to match the spectral sidelobe of uniform fiber Bragg grating with the pure rotational Raman line of atmospheric molecules, the Bragg wavelength of fiber Bragg grating is locally optimized. The structure parameters such as average refractive index change and grating length are used to construct the fabrication system of fiber Bragg grating and to set up the initial processing parameters. Combined with the simulation results of the coupling efficiency of the telescope, the detection performance of the all-fiber optical split rotating Raman lidar is analyzed. The simulation results show that the statistical temperature error of the all-fiber optical splitter-rotating Raman lidar system can reach 1.3 K at the height of 1.5km.
【作者单位】：西安理工大学机械与精密仪器工程学院;
【基金】：国家自然科学基金资助项目(61275185,61308106) 陕西省自然科学基金资助项目(2013JM5001)
【分类号】：TN958.98

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