激光技术2025，Vol.49Issue(1)：8-13,6.DOI:10.7510/jgjs.issn.1001-3806.2025.01.002
基于相干激光雷达的双偏振探测技术
Dual polarization detection technology based on coherent LiDAR
摘要
Abstract
Aiming at the joint analysis of wind field and depolarization ratio in atmospheric remote sensing,a dual-polarization coherent detection method was proposed.Based on traditional coherent wind light detection and ringing(LiDAR),a detection system that can achieve diversity reception of orthogonal polarization signals was designed,and the calculation principle of atmospheric depolarization ratio under this system was derived.A systematic experiment was conducted to compare and observe the radial wind speed information of parallel polarized light and vertically polarized light under different weather conditions,and to describe the atmospheric state in combination with real-time atmospheric depolarization ratio parameters in two dimensions.The results show that when the laser emission energy is 100 J,the pulse width is 400 ns,and the distance resolution is 30 m,the radial wind speed range in cloudy,foggy,rainy and sunny days can reach 6.0 km,5.5 km,3.0 km and 3.0 km,respectively.The range of atmospheric depolarization ratio is 2.0 km,2.0 km,1.0 km,1.0 km;the consistency of the dual-channel radial wind speed in the range does not change with the weather.This study provides a reference for the integrated detection of multiple atmospheric elements.关键词
激光技术/激光雷达/双偏振接收/相干多普勒测风/大气退偏比Key words
laser technique/light detection and ranging/dual-polarization reception/coherent Doppler wind measurement/atmospheric depolarization ratio分类
信息技术与安全科学引用本文复制引用
罗晓翩,冯力天,尹微,靳国华,彭涛,董吉辉,张永科,周鼎富..基于相干激光雷达的双偏振探测技术[J].激光技术,2025,49(1):8-13,6.基金项目
四川省科技计划资助项目(2022YFG0352) （2022YFG0352）
