激光技术2017，Vol.41Issue(2)：251-254,4.DOI:10.7510/jgjs.issn.1001-3806.2017.02.021
相干激光测风雷达环行器参量对测程的影响
Influence of circulator parameters of coherent wind lidar on distance measurement
彭涛 1姜勇 1陶刚 1靳国华 1李策 1周鼎富1
作者信息
摘要
Abstract
In order to improve the capability of wind lidar, based on mathematics modeling method and circulator principle, the transmitted beam quality of circulator was analyzed.The influence of divergence angle on the peak intensity at target distance was discussed.The definition of coupling efficiency of circulator was proposed.And the influence of misalignment between transmitting and receiving axis on detection range was researched.Experimental platform was built to obtain spot parameters in the far field.The simulation results were verified.The results show that, the relative peak intensity at the same distance decreases with the increasing of divergence angle of transmitted beam.The detection range of lidar is mainly affected by misalignment, and misalignment of mrad would make detection range decrease by 89.7 %.Therefore, the collimation ratio of optical antenna should be increased reasonably and the structure precision for adjusting misalignment should be better than 0.1mrad level.关键词
激光技术/激光测风雷达/环行器/光束质量/偏轴度Key words
laser technique/wind lidar/circulator/beam quality/misalignment分类
信息技术与安全科学引用本文复制引用
彭涛,姜勇,陶刚,靳国华,李策,周鼎富..相干激光测风雷达环行器参量对测程的影响[J].激光技术,2017,41(2):251-254,4.
