一种脉宽可调的窄脉冲激光器驱动电路设计  

Design of a Narrow Pulse Laser Drive Circuit with Adjustable Pulse Width

作　　者：张瑞峰 崔佳敏 Zhang Ruifeng;Cui Jiamin(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》2021年第21期142-147,共6页Laser & Optoelectronics Progress

基　　金：国家重点研发计划“重大科学仪器设备开发”重点专项(8YFF01013203)。

摘　　要：针对半导体激光器中纳秒级脉宽的驱动电路脉冲宽度范围小、无法调节的问题,提出一种脉宽可调的窄脉冲激光器驱动电路设计方案。根据现场可编程逻辑门阵列(FPGA)技术和半导体激光的工作原理,搭建了半导体激光驱动电路的一般模型,并进行了仿真与实验分析。以FPGA开发板为控制核心,使用高速金属氧化物半导体场效应晶体管(MOSFET)驱动芯片DE375作为开关,实现驱动电源及半导体激光器的精密控制。该电路输出的脉冲电流幅值可达40 A,脉冲宽度为5~200 ns,重复频率为0~50 kHz,上升沿宽度小于5 ns,有效增强了半导体激光器驱动电路的功能。Aiming at the problem that the pulse width range of the driving circuit with nanosecond pulse width in semiconductor lasers is small and cannot be adjusted,a design scheme of a narrow pulse laser driving circuit with adjustable pulse width is proposed.According to the field programmable logic gate array(FPGA)technology and the working principle of the semiconductor laser,a general model of the semiconductor laser drive circuit is built,and simulation and experimental analysis are performed.Taking FPGA development board as the control core,using high-speed metal oxide semiconductor field effect transistor(MOSFET)drive chip DE375 as a switch to achieve precise control of the drive power and semiconductor laser.The output pulse current amplitude of the circuit can reach 40 A,pulse width is 5-200 ns,repetition frequency is 0-50 kHz,and rising edge width is less than 5 ns,which effectively improves the function of the semiconductor laser drive circuit.

关 键 词：激光器 半导体激光器 脉冲宽度调制 驱动电源 高速金属氧化物半导体场效应晶体管 

分 类 号：TN24[电子电信—物理电子学]