二维激光告警中的激光脉宽测量技术研究  

Research on laser pulse width measurement technology in two-dimensional laser warning

作　　者：石金 张瑞 吴琼[1,3] 杜伟豪 杨雪梅 王志斌 SHI Jin;ZHANG Rui;WU Qiong;DU Weihao;YANG Xuemei;WANG Zhibin(Nantong Institute of Intelligent Opto-Mechatronics,North University of China,Nantong Jiangsu 710065,China;School of Instrument and Electronics,North University of China,Taiyuan 030051,China;Academy for Advanced Interdisciplinary Research,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学南通智能光机电研究院,江苏南通710065 [2]中北大学仪器与电子学院,太原030051 [3]中北大学前沿交叉科学研究院,太原030051

出　　处：《激光杂志》2021年第9期33-37,共5页Laser Journal

基　　金：山西省面上青年基金项目(No.201801D221211);山西省创新项目(No.2019L0530);山西省自然科学基金(No.201901D111145)。

摘　　要：针对二维激光告警中对于军用激光脉冲宽度测量的需要,设计一种分辨率达到皮秒级别的激光脉宽测量系统。设计了光电探测电路及高精度时间数字转换电路,通过高速光电探测器及其放大电路将激光脉冲信号转换成电信号,后经高精度时间数字转换电路来测量激光脉冲宽度,采用专用芯片TDC-GPX2来实现时间数字转换,该测量系统可测量出激光器发出的最小脉宽5 ns,脉冲上升时间4 ns。最后,通过与其他激光脉冲宽度测量方案对比,表明该系统稳定性和脉宽测量精度均能达到了实际应用要求。In order to meet the needs of military laser pulse width measurement in two-dimensional laser warning,a laser pulse width measurement system with resolution of picosecond is designed. The photoelectric detection circuit and high-precision time digital conversion circuit are designed. The laser pulse signal is converted into electrical signal by high-speed photoelectric detector and its amplification circuit,and then the laser pulse width is measured by highprecision time digital conversion circuit. The special chip tdc-gpx2 is used to realize time digital conversion. The minimum pulse width of the laser can be measured by the measurement system,which is 5 ns and the pulse rise time is4 ns. Finally,compared with the other laser pulse width measurement schemes,it shows that the stability and pulse width measurement accuracy of the system can meet the requirements of practical application.

关 键 词：光电转换 激光脉冲宽度 TDC-GPX2 光电探测器 

分 类 号：TN249[电子电信—物理电子学]