基于全光纤光谱干涉的多路超短脉冲时间同步单次测量技术  

Single-Shot Synchronous Measurement Technique for Multichannel Ultra-Short Pulse Lasers Based on All-Fiber Spectral Interference

作　　者：梁彦 易友建 朱坪 张栋俊 李展 谢兴龙[2,3] 康俊 杨庆伟[2] 孙美智[2] 梁潇[2] 朱海东[2] 郭爱林[2] 高奇[2] 欧阳小平[2] 章冬辉[2,3] 李林骏 朱健强 Liang Yan;Yi Youjian;Zhu Ping;Zhang Dongjun;Li Zhan;Xie Xinglong;Kang Jun;Yang Qingwei;Sun Meizhi;Liang Xiao;Zhu Haidong;Guo Ailin;Gao Qi;Ouyang Xiaoping;Zhang Donghui;Li Linjun;Zhu Jianqiang(School of Physical Science and Technology,ShanghaiTech University,Shanghai 200120,China;Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]上海科技大学物质科学与技术学院,上海200120 [2]中国科学院上海光学精密机械研究所,上海201800 [3]中国科学院大学材料与光电研究中心,北京100049

出　　处：《中国激光》2021年第16期82-90,共9页Chinese Journal of Lasers

基　　金：国家自然科学基金(12074399,12004403,61705245,11704392);中国科学院战略性先导科技专项(XDA25020105,XDA25020306);中国科学院重点实验室创新基金(CXJJ-2019S015);上海市青年科技英才扬帆计划(19YF1453500);上海市科技创新行动计划(19560713700);上海市软科学研究计划(20692114101)。

摘　　要：提出一种基于全光纤光谱干涉的多路超短脉冲大动态范围时间同步单次测量方法,弥补了非线性相关法测量同步状态时测量范围小和示波器测量时分辨率差的不足,解决了同步测量中空间光路的复杂性和单次实时测量的难题。首先对多路光纤阵列干涉测量进行仿真计算,然后设计四路脉冲传输的光路并在实验中验证多路同步单次测量方法的可行性,最后详细分析测量误差的来源和影响。该测量方法的最小同步时间精度为5.3fs,测量范围为1.055~14.751 ps,与仿真结果有较好的一致性。该测量方法具有光纤链路易于集成、光谱干涉数据处理速度快、测量信号能量需求低等优势,在多路超短脉冲激光相干合束系统中有重要应用前景。Objective In the past 20years,ultra-short ultra-intense laser technology has experienced rapid development.However,the maximum output power of these lasers is limited by nonlinear effects,large diameter compression grating technology,gain bandwidth limitations,and other factors.One of the most promising technologies to further enhance output ability is coherent beam combining.Effective coherent beam combining requires strict inter-beam synchronization.In recent years,many attempts have been made to improve synchronous measurement and control.The research progress of most implementations has been solely based on photoelectric detection,optical balanced cross-correlation,and temporal and spatial interferences.Nevertheless,these methods need to maintain the time interval of the two beams in coherent time,limiting the femtosecond pulse synchronous measurement range within1ps.The ability of an electronic oscilloscope to achieve a time resolution less than 10ps is difficult;therefore,it is more difficult to accurately measure the pulse delay within 1--10ps.In addition,for online synchronous measurement of a multichannel ultra-short pulse coherent beam combining system,the abovementioned methods are more complicated to implement and cannot achieve a single-shot measurement.In this paper,a single-shot measurement method for a multichannel ultra-short pulse with large dynamic range time synchronization based on all-fiber spectral interference is proposed.This method has a wider measurement range to measure synchronization than the nonlinear correlation method and a larger measurement accuracy than an oscilloscope.Our method improves efficiency in multichannel laser synchronous measurements for engineering applications and has important application potential for multichannel ultra-short pulse laser coherent beam combining systems.Methods First,theoretical and simulation analyses based on multichannel optical fiber array spectral interferometry were carried out.Predictions ofτmin andτmaxfor the designated measurement rang

关 键 词：测量 同步测量 超短脉冲 光谱干涉 光纤阵列 单次测量 

分 类 号：O436[机械工程—光学工程]