高重频激光测距系统收发电路设计  

Design of Laser Transceiver Circuits Based on High Frequency Laser Rangefinder

作　　者：李忠旺[1] 左胜广[1] 陈巧霞[1] LI Zhong-wang;ZUO Sheng-guang;CHEN Qiao-xia(The 27th Research Institute of China Electronics Technology Group Corporation,Zhengzhou 450047,China)

机构地区：[1]中国电子科技集团公司第二十七研究所,郑州450047

出　　处：《电光系统》2024年第2期14-18,共5页Electronic and Electro-optical Systems

摘　　要：为了满足激光雷达、三维成像等系统高采样速率,宽温度范围工作和高探测精度的需求,对激光收发电路进行了优化设计。通过优化LD驱动电路,实现了高重频、窄脉宽和大峰值功率的激光输出;通过优化APD温度补偿电路,保证了全温度范围内APD转换增益的稳定性;通过增加时变增益放大电路,完成了对不同距离目标回波的增益调节。实验结果证实了该设计的有效性,测距重频可达50kHz,工作温度范围为-20℃~80℃,测距范围大于2000m测距精度优于0.2m。To meet the high frequency,wide operating temperature range and high accuracy requirement of Lidar and three-dimensional imaging system,laser transceiver circuits are optimized.By optimizing the LD drive cir-cuit,high repetition rate,narrow pulse width,and high peak power of the laser are achieved.By optimizing APD temperature compensation circuit,APD gain conversion stability is ensured within full temperature range.By adding time-variant gain control circuit,gain adjustment to different distance is completed.The experimental results confirm the effective of the design:the measurement repetition rate of 50 kHz under-20℃C~80℃.Ranging range is over 2000 m.Measurement accuracy is better than 0.2 m.

关 键 词：激光发射 APD偏压 温度补偿 时变增益 

分 类 号：TN247[电子电信—物理电子学]