亚纳秒级上升沿窄脉冲驱动电路与模拟仿真  

Sub-nanosecond Rising-edge Narrow Pulse Driver Circuit and Analog Simulation

作　　者：李益 温文龙[1] 王谦豪 李强龙[1] 赵华龙[1] 李峰[1] LI Yi;WEN Wenlong;WANG Qianhao;LI Qianglong;ZHAO Hualong;LI Feng(Photonic Manufacturing System and Application Research Center,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China;School of Optoelectronics,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院西安光学精密机械研究所光子制造系统与应用研究中心,西安710119 [2]中国科学院大学光电学院,北京100049

出　　处：《光子学报》2024年第10期126-143,共18页Acta Photonica Sinica

基　　金：国家重点研究发展计划中国科学院“西部之光”计划(No.XAB2021YN12);陕西青年科技之星(No.2022KJXX-98);中国科学院青年创新促进会(No.XIOPMQCH2021007)。

摘　　要：针对半导体激光二极管(LD)驱动电路中存在的上升沿缓慢问题,设计了一种具有亚纳秒上升沿的窄脉冲电路。从理论方面分析了回路中电感、电容等参数对输出激光脉冲上升沿的影响,驱动电路以内置驱动的GaN集成模块作为主开关进行电路的合理设计驱动半导体激光二极管;利用现场可编程门阵列作为控制核心设计时序信号,实现LD脉宽和重频的精确调节;以ADN8831驱动热电制冷器(TEC)实现LD精确恒温控制。通过模拟仿真和实验验证,获得了亚纳秒级的脉冲前沿,脉冲宽度5 ns至15 ns可调,重复频率1 kHz至10 kHz可调,LD的温度设定为25℃至26℃,12 h功率稳定性RMS测试值为0.51%。Semiconductor lasers have made great progress in theoretical research,practical application and technological development in the half century since their introduction.Today,they occupy the majority of the market share in the entire laser field,and are widely used in a variety of fields such as communication networks,medical aesthetics,laser sensing,and single-photon detection.Photon detection,for example,is a technique capable of detecting extremely low noise,with enhanced sensitivity enabling it to capture the smallest energy quantum of light,the photon.Not only does this technique allow for the precise counting of individual photons,which greatly enhances the accuracy and efficiency of detection,but it is also widely used in fields such as laser ranging and LIDAR to achieve high-resolution distance measurement and target detection.In laser ranging,the onset time of a laser pulse is usually defined by the rising edge of the pulse,so the steepness of the rising edge directly affects the accuracy of time-of-flight measurement.In LIDAR systems,a fast rising edge helps to shorten the laser emission time and increase the laser power,which in turn enhances the system's ability to sense the environment.Therefore,as the source of the laser signal,a semiconductor laser outputting narrow pulses with fast rising edges is crucial for improving the system accuracy.In this paper,a narrow pulse circuit with sub-nanosecond rising edge is designed,and the effects of inductance,capacitance and other parameters in the circuit on the rising edge of the output laser pulse are theoretically analyzed.The driver circuit uses a GaN integrated module with built-in driver as the main switch,and the semiconductor laser diode is driven by a reasonably designed driver circuit.At the same time,Field Programmable Gate Array(FPGA)is used as the control core to design the timing signals to realize the precise adjustment of the laser diode's pulse width and repetition frequency;and the thermoelectric cooler is driven by ADN8831 to realize the con

关 键 词：亚纳秒上升沿 窄脉宽 FPGA 驱动电路 恒温控制 

分 类 号：TN78[电子电信—电路与系统]