激光器相位噪声对相干激光雷达性能的影响  

Influence of Laser Phase Noise on Performance of Coherent Lidar

作　　者：蔡猛 郑威[3] 王朝晖 井晨睿 马赛[5] CAI Meng;ZHENG Wei;WANG Zhaohui;JING Chenrui;MA Sai(Science and Technology on Electro-Optical Control Laboratory,Luoyang 471000,China;Luoyang Institute of Electro-Optical Equipment,AVIC,Luoyang 471000,China;No.73602 Unit of PLA,Nanjing 211000,China;College of Physical & Electronic Information,Luoyang Normal University,Luoyang 471000,China;China Luoyang Electronic Equipment Test Center,Luoyang 471000,China)

机构地区：[1]光电控制技术重点实验室,河南洛阳471000 [2]中国航空工业集团公司洛阳电光设备研究所,河南洛阳471000 [3]中国人民解放军73602部队,南京211000 [4]洛阳师范学院物理与电子信息学院,河南洛阳471000 [5]中国洛阳电子装备试验中心,河南洛阳471000

出　　处：《电光与控制》2021年第8期92-95,共4页Electronics Optics & Control

基　　金：国家自然科学基金(61575099,11704174)。

摘　　要：首先分析了不同激光线宽情况下激光相位噪声的特征;然后针对激光相位噪声对相干激光雷达探测性能的影响建立理论模型;最后采用统计仿真试验的方法,针对脉冲式和调频连续波两种典型的相干激光雷达,进行激光相位噪声对相干激光雷达性能影响的仿真研究。研究结果表明:对于脉冲光的情况,探测性能受相位噪声的影响与探测距离的关系不大,无需要求探测距离在相干长度之内;而对于调频连续波的情况,探测性能会受到相位噪声的影响较大,应保证探测距离比相干长度小一个量级。Firstthe characteristics of laser phase noise under different laser linewidth conditions are analyzed.Thena theoretical model of the influence of laser phase noise on detection performance of coherent lidar is established.Finallythe influence of laser phase noise on performance of coherent lidar is analyzed by statistical simulation specific to two typical cases including pulse coherent lidar and FMCW coherent lidar.The research results show that:1)In the case of pulsed laserthe influence of laser phase noise on detection performance has little relationship with detection rangeso it is unnecessary to restrict the detection range to be less than the coherent length;and 2)In the case of FMCW coherent lidarthe detection performance is much susceptible to laser phase noiseso it is necessary to restrict the detection range to be less than the coherent length with one order of magnitude.

关 键 词：相干激光雷达 相位噪声 探测灵敏度 探测精度 

分 类 号：TN958.98[电子电信—信号与信息处理]