基于开关电路偏压控制模块的相位激光测距方法  

Phase laser ranging method based on switching circuit bias control module

作　　者：何卓尔 周鹏威 简天浩 HE Zhuoer;ZHOU Pengwei;JIAN Tianhao(School of Optics and Electronic Technology,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学光学与电子科技学院,杭州310018

出　　处：《光通信技术》2023年第5期67-70,共4页Optical Communication Technology

基　　金：国家自然科学基金项目(62075202)资助;浙江省自然科学基金项目(LY20F050008)资助;浙江省属高校基本科研业务费专项资金资助。

摘　　要：针对传统基于导频信号的外调制测距方法精度不高的问题,提出了一种基于开关电路偏压控制模块的相位激光测距方法。首先,分析了传统测距方法测距精度不高的原因;然后,设计了基于开关电路的偏压控制模块,以此改变传统测距方法在射频端同时输入粗尺信号和精尺信号的方式,在马赫-曾德尔调制器(MZM)的偏置电压输入端、射频端分别输入粗尺信号、精尺信号,同时实现偏压控制和激光测距。实验结果表明:在距离80 cm处进行500次测量时,测距系统相位差的重复性为±0.1504°,对应的测距精度为±0.0261 cm。Aiming at the problem of low accuracy of traditional external modulation ranging method based on pilot signal,a phase laser ranging method based on switching circuit bias control module is proposed.Firstly,the reasons for the low accuracy of the traditional ranging method are analyzed.Then,a bias control module based on switching circuit is designed,which changes the traditional way of inputting coarse scale signal and fine scale signal at the radio frequency end at the same time,and inputting coarse scale signal and fine scale signal at the radio frequency end of Mach-Zender modulator(MZM)to realize bias control and laser distance measurement simultaneously.The experimental results show that the repeatability of phase difference is±0.1504°and the accuracy is±0.0261 cm when 500 measurements are made at a distance of 80 cm.

关 键 词：激光测距 偏压控制 马赫-曾德尔调制器 

分 类 号：TN29[电子电信—物理电子学]