转动拉曼激光雷达大气温度绝对探测技术研究

项目名称： 转动拉曼激光雷达大气温度绝对探测技术研究

项目编号： No.61308106

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 李仕春

作者单位： 西安理工大学

项目金额： 28万元

中文摘要： 转动拉曼测温激光雷达是大气温度探测的有效手段及方法，但转动拉曼激光雷达探测大气温度一般需要其它并行设备对系统进行校正的问题，严重制约其在气象及环境监测领域中的实用化进程。本项目提出利用大气分子转动拉曼谱型与温度之间的依赖关系，研究转动拉曼测温激光雷达的大气温度绝对探测技术。以最新研制成功的可见光波段窄带光纤Bragg光栅为核心器件，结合传统衍射光栅的空间分光优势，重点研究两级多路并行转动拉曼分光技术和特种光纤线阵列光信号转接耦合技术，强背景条件下的微弱转动拉曼散射谱线的多谱线实时分离、多路并行转动拉曼信号光实时检测，以及转动拉曼散射谱线的谱型拟合，大气温度的绝对反演算法等关键技术与方法，并开展实验验证研究，以期实现转动拉曼激光雷达的大气温度绝对探测技术。研究融合现代光纤传感和激光遥感等新技术，其成果可为拉曼激光雷达准确探测温度廓线提供新的设计思路及方法，为实用化研发提供技术支撑。

中文关键词： 大气光学；转动拉曼激光雷达；绝对探测技术；校正技术；多路并行分光技术

英文摘要： The rotational Raman lidar is a valid tool and method for detecting atmospheric temprature. But the fact that its using for measuring atmospheric temprature needs generally to a certain collocated device for calibration seriously restricts its application progress in the meteorology and environmental monitoring fields. The absolute detection technique of the rotational Raman lidar for atmospheric temprature are researched in this project using the dependence of rotational Raman spectral envelope on temprature. We use the fiber Bragg grating in the visible wavelength having sucessfully been studied and fabricated as the core device, and integrate the superiority of the conventional diffraction grating. We mainly research the key techniques and methods such as the two-stage multi-channel parrlel rotional Raman spectroscopic technique and the custom-made fiber-line-array optical coupling technique, the technique of the multi-spectra-line real-time separating the weak rotational Raman spectra-line under the intensive background condition and the multi-channel real-time detecting the rotational Raman optical signal, the fit method of the rotational Raman spectral envolope and the absolute retrieve algorithm for atmospheric temprature. The experimental verification research is executed to implement the absulte detecti

英文关键词： Atmospheric optics；rotational Raman lidar；absolute detection technique；calibration technique；multi-channel parallel spectroscope