基于多波长激光探测海洋大气波导机理及实验研究  

Based on multiple wavelength laser detection marine atmospheric duct mechanism and experiment research

作　　者：吴荣华[1] 李胜勇[1] 任席闯 WU Rong-hua;LI Sheng-yong;REN Xi-chuang(Dept.of Electron Eng.,Naval Univ.of Engineering,Wuhan 430033,China;Unit 91001)

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033 [2]91001部队

出　　处：《激光与红外》2021年第8期980-984,共5页Laser & Infrared

基　　金：国家自然科学基金项目(No.41306036)资助。

摘　　要：海洋大气波导是能够影响侦察预警探测装设备和常用民用航型保障设备的重要大气环境因素。本文采用一种基于激光探测遥感探测大气波导的技术,通过分析计算典型海洋大气多波长激光传输特性、光波波段折射率结构常数与激光探测大气波导机理模型。同时通过自主研制的激光雷达在三亚等地进行大量实践大气波导探测,并同步开展探空气球探测低空100 m范围内的温度和湿度剖面,采用温度和湿度剖面获取折射率剖面和激光传输的消光系数垂直分布以及光波段的折射率结构常数分布,实验分析初步表明用激光探测大气波导尤其是海上大气波导尤其是蒸发波导的可行性。Ocean atmospheric duct is an important atmospheric environmental factor that can affect reconnaissance warning equipment and civil navigation support equipment.In this paper,a new technique of laser detection of atmospheric duct is introduced,the propagation characteristics of multi-wavelength laser in ocean atmosphere,refractive index structure constant of optical wave band and the mechanism model of multi-wavelength laser detecting atmospheric duct are analyzed.A lot of experiments have been carried out in Sanya and other places by using self-developed lidar,the humidity and the temperature of the atmosphere with different height were measured simultaneity when the return back signal of laser radar was collected.The vertical profile of the temperature and humidity was measured,and then the vertical profile of atmospheric refractivity was calculated.The space distribution and the temporal distribution of the refractive index structure constant were analyzed.It came to the conclusion that the vertical profile of the extinction coefficient had some clear relativity with atmospheric duct,this approved that detecting the atmospheric duct,and especially evaporation duct with laser method was probable.

关 键 词：激光探测 大气波导 消光系数 大气折射率 

分 类 号：TB936[一般工业技术—计量学] TN249[机械工程—测试计量技术及仪器]