激光技术2024，Vol.48Issue(5)：613-619,7.DOI:10.7510/jgjs.issn.1001-3806.2024.05.001
相干测风激光雷达回波偏振态对径向风速精度影响
Influence of echo polarization of coherent wind LiDAR on radial wind speed accuracy
彭涛 1王顺艳 1王丹凤 1范琪 1罗雄 1周鼎富1
作者信息
- 1. 西南技术物理研究所,成都 610041,中国
- 折叠
摘要
Abstract
In order to solve the polarization mismatch between echo and local oscillator caused by the atmospheric depolarization effect leading to a decrease in heterodyne efficiency of coherent wind light detection and ranging(LiDAR),the influence of echo polarization on signal-to-noise ratio and ranges and radial wind speed error was simulated using mathematical modeling method,based on the system composition and working principle of coherent Doppler wind LiDAR.By proposing a polarization state correction approach and using Jones matrix,a model was built to discuss the correction accuracy.According to the comparative test of radial wind speed,the influence of different echo polarization on radial wind speed accuracy was verified.The results show that for the same system and weather,if the echo is elliptical polarization,the maximum range will decrease by 46.7%and the radial wind speed accuracy will decrease by 63%compared to the circular polarization.This study provides theoretical support for the optimization of echo receiving module of coherent Doppler wind LiDAR.关键词
激光技术/径向风速精度/验证实验/回波偏振态Key words
laser technique/radial wind speed accuracy/verification test/echo polarization分类
电子信息工程引用本文复制引用
彭涛,王顺艳,王丹凤,范琪,罗雄,周鼎富..相干测风激光雷达回波偏振态对径向风速精度影响[J].激光技术,2024,48(5):613-619,7.
