固体相干激光雷达多普勒测速实验  

Coherent solid-state lidar and its application in Doppler velocity measurement

作　　者：张海洋[1] 王景峰[1] 赵长明[1] 杨苏辉[1] 

机构地区：[1]北京理工大学光电工程系,北京100081

出　　处：《红外与激光工程》2006年第z3期284-288,共5页Infrared and Laser Engineering

摘　　要：采用单块非平面环形激光器作为种子,注入到单纵模运转的 Q 开关高重复频率 Nd:YAG 激光器为发射源,同时运用温度反馈控制,使种子光源和从动激光器自由振荡频率相匹配,实现稳定的单频输出。采用外差式相干探测的方法,测量运动目标的多普勒频移,从而达到测量运动物体速度信息的目的。根据实验现象,分析失谐频率△ω对外差探测的影响,提出了改进措施并应用于实验。比较已观测到的实验数据与理论计算值分析误差来源。One approach is to inject the laser of monolithic non-planar unidirectional ring laser into a high power Q switch Nd:YAG laser to obtain a continuous wave single frequency master laser,simultaneity,to lock the frequency of the Q-switched laser to the master oscillator,the frequency of master laser is adjusted by precisely controlling the temperature of the laser crystal.The speed of moving object is observed by the ways of heterodyne detection which measured the Doppler information of moving object.Through the experiment,the influence of off-resonance frequency on the heterodyne detection is evident,and the improvement is put forward and applied in the experiment.By the comparison of the data of the experiment with computed value in theory,the error reason is analyzed.

关 键 词：相干激光雷达 外差探测 多普勒效应 

分 类 号：TN958.4[电子电信—信号与信息处理]