磁光开关时分复用全固态激光雷达实验研究  

Experimental Study of All-Solid-State Lidar Based on Magneto-Optical Switching Time Division Multiplexing

作　　者：王振川 刘雪生 郝鹏 姚晓天 Wang Zhenchuan;Liu Xuesheng;Hao Peng;XSteve Yao(Photonics Information Innovation Center,College of Physics Science&Technology,Hebei University,Baoding 071002,Hebei,China;Hebei Provincial Center for Optical Sensing Innovations,Baoding 071002,Hebei,China)

机构地区：[1]河北大学物理科学与技术学院光信息技术创新中心,河北保定071002 [2]河北省光学感知技术创新中心,河北保定071002

出　　处：《激光与光电子学进展》2023年第12期461-467,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(12004092);河北省创新能力提升计划(20542201D);河北省自然科学基金重点项目(F2021201013);河北省自然科学基金(F2020201041);河北省高等学校科学技术研究项目(QN2019035);河北大学高层次人才科研启动项目(801260201243)。

摘　　要：因磁光开关的开关速度快、可靠性高、串扰小等特点,提出一种基于光纤磁光开关的时分复用全固态激光雷达。分析了基于光纤磁光开关的时分复用全固态激光雷达的成像原理,实验测试影响激光雷达性能的磁光开关相关性能参数,包括延迟时间、开关上升沿时间、插入损耗、回波损耗。随后,基于1×8光纤磁光开关搭建了时分复用全固态激光雷达实验系统,通过磁光开关将光路切换到二维光束阵列不同位置的光纤通道中,基于飞行时间(ToF)测距技术实现了激光雷达的快速三维成像。最终,通过对空间目标构建三维点云图,验证了该雷达系统的全固态三维成像能力,实现了510.3 Hz的扫描频率和0.36°的角度分辨率,并通过微平移台可将角度分辨率提高到0.18°。与micro-electro-mechanical system(MEMS)和光学相控阵的光束成像技术相比,所设计的技术方案具有成本低、能量利用率高和光束质量高等优点。Based on the characteristics of magneto-optical switch,such as fast switching speed,high reliability,and low cross talk,a time division multiplexing solid-state lidar based on a fiber magneto-optical switch is proposed.First,the working principle and properties of the time division multiplexing solid-state lidar based on a fiber magneto-optical switch are discussed and examined,and the performance indexes of the magneto-optical switch related to the performance of lidar are tested,including delay time,switch rising edge time,insertion loss,and return loss.Then,a time division multiplexing solid-state lidar system was constructed based on the 1×8 optical fiber magneto-optical switch.A time-offlight(ToF)ranging technology was used to quickly achieve three-dimensional(3D)imaging of the lidar by switching the optical path to the fiber channel at various locations of the two-dimensional beam array.Finally,the 3D point cloud map of the measured object was built in the experiment to confirm the system’s all-solid-state 3D imaging capability.The scanning frequency of 510.3 Hz and angular resolution of 0.36°are achieved,and the angular resolution is increased to 0.18°by the microjitter translation platform.The developed technique has advantages over micro-electro-mechanical system(MEMS)and optical phased array beam imaging technology,including low cost,high energy utilization,and good beam quality.

关 键 词：激光雷达 时分复用 磁光开关 光纤阵列 

分 类 号：TN958.98[电子电信—信号与信息处理]