对激光雷达特定的发射模块后向散射信号的调制和设计（英文）  

Lidar-backscattered signal modulation and design for a specific emitting module

作　　者：张小富[1] 乐小云[1] 

机构地区：[1]北京航空航天大学物理科学与核能工程学院,北京100191

出　　处：《红外与激光工程》2015年第3期888-892,共5页Infrared and Laser Engineering

摘　　要：测云激光雷达具有精度高和稳定性好的特点,是检测云高的有效途径。作为激光雷达系统的一个基本组成部分,脉冲二极管激光器(PLD)需要脉冲信号触发。对激光雷达的发射部分进行了研究,其中包括后向散射信噪比的仿真、脉冲二极管激光器的选择与触发电路、用于驱动综合光学系统的波长为905 nm的PLD的电路。触发电路激光脉冲具有可调功率和脉冲宽度功能。用Systemview软件仿真设计,完成了PCB版的制作。结果表明:脉冲的任何参数即触发脉冲宽度、上升沿、抖动等均可用于实验中,并具有低成本和使用方便的优点。该发光模块在测云激光雷达中运行良好。The cloud lidar, with the character of high precision and good stability, is an effective way to detect the cloud height. Pulse diode laser（PLD）, as an essential part of the lidar system, needs the triggering pulse. In this paper, the emitting part of the lidar was studied, including the simulation of the backscatter SNR, choosing of PLD and design of trigging circuit to drive the 905 nm PLD with the consideration of the optical system. A circuit for trigging the laser pulse with adjustable power and pulse width was contrived. Then the software Systemview was used to emulate the design and finally the making of PCB was finished. The results show whatever the parameters of the pulse, namely trigging pulse width, the rising edge, dithering, all these can be qualified to be in use in practice and enjoys the merits of low cost and convenience. The emitting module operates well.

关 键 词：激光雷达 脉冲半导体激光器 后向散射信噪比 触发电路 

分 类 号：TN958.1[电子电信—信号与信息处理]