光纤传输在激光雷达探测距离模拟中的应用  

Application of fiber propagation in distance detection simulation of LiDAR

作　　者：龚桃荣[1] 朱精果[1] 黄琴华[1] 任建峰[1] 

机构地区：[1]中国科学院光电研究院,北京100094

出　　处：《传感器与微系统》2012年第9期142-145,共4页Transducer and Microsystem Technologies

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AA121304)

摘　　要：为了能在室内测试激光雷达的远距离探测能力,提出利用光纤传输时延等效模拟激光在大气中传输时延的方案。首先以激光雷达传输方程为依据对该方案进行了理论分析,定量得出光纤衰减对其模拟激光在大气中距离传播的影响。然后针对1.55μm波长激光设计了光纤直路传输模拟和环路传输模拟2种方式,并将光纤距离模拟引入实际激光雷达系统中,采用69.1 m单模光纤等效大气传输101.4 m,对自由空间3.5 m外的模拟目标物进行成像探测,获得了目标表面的三维立体成像。In order to test the long distance detection capability of LiDAR in laboratory, a method of time delay generated by laser propagating in fiber is proposed for equivalent time delay in air. First, the theoretic analysis of this method is completed according to propagation equation of LiDAR system, and the impact of fiber attenuation on the feasibility of this method is gained quantitatively. Then, two ways of forthright transmission and circulating loop transmission are designed with 1.55 μm wavelength laser. The distance simulation with fiber is introduced to the LiDAR system. The time delay of 69. i m fiber is equivalent to that of 101.4 m in air. Laser transmits through the 69. i m fiber, and then enters in the LiDAR transmitter model to detect a simulacrum object which is 3.5 m in the free space and the 3D image of the surface of the object is obtained.

关 键 词：光纤传输 激光雷达 远距离探测 三维成像 

分 类 号：TN249[电子电信—物理电子学]