窄脉宽大电流半导体激光器驱动电路研究  

Study on Driving Circuit of Narrow Pulse Width and Large Current Semiconductor Laser

作　　者：杜建艳 赵毅强 叶茂 林元琦 郑肖肖 Du Jianyan;Zhao Yiqiang;Ye Mao;Lin Yuanqi;Zheng Xiaoxiao(School of Microelectronics,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学微电子学院,天津300072

出　　处：《激光与光电子学进展》2022年第1期251-259,共9页Laser & Optoelectronics Progress

基　　金：广西创新驱动发展专项(18118038)。

摘　　要：激光雷达被广泛应用在无人驾驶、测量测绘等领域,为降低功耗、成本和体积,脉冲式半导体激光器成为激光驱动电路的首选。在此背景下,以电感为储能元件对一种窄脉宽大电流半导体激光驱动电路进行了优化设计。在详细介绍驱动电路的工作原理的基础上,重点研究了储能电感值大小与电路功耗的影响关系。运用ORCAD PSPICE仿真软件建立了驱动电路仿真模型,总结出影响脉冲电流的脉宽、峰值和波形振荡的主要因素。测试表明,在电路重复频率为10 kHz的条件下,储能电感功率损耗为59 mW,驱动电路的脉宽为3.8 ns,上升沿为3.5 ns,下降沿为3.7 ns,峰值电流为132 A,激光器输出峰值光功率约为326 W。Laser radar is widely used in unmanned driving,surveying,and mapping,etc.In order to reduce power consumption,cost,and volume,pulsed semiconductor laser has become the first choice of laser drive circuit.Under this background,an optimal design of narrow pulse and large current semiconductor laser drive circuit is completed with inductor as energy storage element.Based on the working principle of the driving circuit in detail,the influence relationship between the value of the energy storage inductor and the power consumption of the circuit is emphatically studied.The driving circuit simulation model was established by using ORCAD PSPICE simulation software,and the main factors affecting the pulse width,peak value,and wave oscillation of the pulse current were summarized.The test results show that the power loss of the energy storage inductor is 59 mW,the pulse width of the driving circuit is 3.8 ns,the rising edge is 3.5 ns,the falling edge is 3.7 ns,the peak current is 132 A,and the peak optical power of the laser output is about 326 W at 10 kHz.

关 键 词：激光光学 窄脉宽 大电流 半导体激光器 驱动电路 储能电感 

分 类 号：P228.5[天文地球—大地测量学与测量工程]