面向室外应用的重复频率锁定皮秒脉冲光纤激光器  

Repetition-Rate-Locked Picosecond Pulsed Fiber Laser for Operating in Outdoor Environment

作　　者：姚波 段典 豆贤安 陈雨君 刘孝兵 毛庆和 Yao Bo;Duan Dian;Dou Xian’an;Chen Yujun;Liu Xiaobing;Mao Qinghe(Anhui Provincial Key Laboratory of Photonics Devices and Materials,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,Anhui,China;Anhui Laboratory of Advanced Laser Technology,Hefei 230037,Anhui,China;State Key Laboratory of Pulsed Power Laser Technology,National University of Defense Technology,Hefei 230037,Anhui,China;School of Environmental Science and Optoelectronic Technology,University of Science and Technology of China,Hefei 230026,Anhui,China)

机构地区：[1]中国科学院合肥物质科学研究院安徽光学精密机械研究所,光子器件与材料安徽省重点实验室,安徽合肥230031 [2]先进激光技术安徽省实验室,安徽合肥230037 [3]国防科技大学脉冲功率激光技术国家重点实验室,安徽合肥230037 [4]中国科学技术大学环境科学与光电技术学院,安徽合肥230026

出　　处：《中国激光》2024年第2期10-18,共9页Chinese Journal of Lasers

基　　金：国家重点研发计划(2017YFB0405100,2017YFB0405200);中国科学院战略性先导科技专项(B类)(XDB21010300);国家自然科学基金(61805258);安徽省科技重大专项(201903a07020021);先进激光技术安徽省实验室主任基金(20191001)。

摘　　要：本文报道了一种可满足室外应用的具有重复频率锁定功能的皮秒脉冲光纤激光器。通过选用Figure-9光纤激光器结构,并通过优化腔结构来调控非线性,确保了激光器的快速锁模自启动功能;采用低导热材料绝热封装创建“恒温”微环境,松弛了室外环境下锁定重复频率对PZT频率调谐执行器件调谐量的要求。以此为基础,设计并研制了质量仅为3 kg的10 MHz、20 ps锁模光纤激光器样机。在室温、极端温度(-40℃或50℃)和振动(加速度为1.5g)环境下,该激光器样机都能保持快速锁模自启动和重复频率锁定功能;在室外环境下,该激光器样机的重复频率锁定功能可抵御夏季高温环境下的10℃温度波动。Objective Picosecond laser pulses,characterized by their high peak power and spectral purity,hold significant importance in numerous applications across various fields.Mode-locked fiber lasers,with their compact structure,maintenance-free operation,and superior anti-interference ability,have emerged as one of the most vital sources of picosecond pulse lasers.Among these,SESAM and Figure-9 mode-locked fiber lasers have attracted significant attention owing to their exceptional self-start performance.Furthermore,in precision measurement applications,such as lidar and precision distance measurement,it is imperative to maintain a locked repetition rate of the laser pulse.However,practical engineering applications present novel challenges due to their complex environments,which include temperature changes ranging from-40℃to 50℃across different seasons,violent vibrations during transportation and usage,and stringent requirements concerning volume,weight,and power consumption.These conditions pose challenges to maintaining a locked repetition rate of the picosecond mode-locked fiber laser while ensuring the self-start function.Consequently,the design and development of a picosecond fiber laser with rapid self-start and repetition-rate-locking capabilities becomes a significant issue that warrants further exploration and research.Methods The configuration of the Figure-9 fiber laser was chosen,and the intracavity nonlinearity was optimized to realize the fast self-start mode-locking function for the laser.A constant temperature local-environment for the optical module was established by adiabatically packaging with low-thermal-conductivity materials.This approach significantly relaxed the requirement of the tuning range for the piezoelectric transducer(PZT)frequency tuning mechanism to lock the repetition rate of the fiber laser operating in the outdoor environment.Based on these advancements,a prototype mode-locked fiber laser weighing only 3 kg was designed and developed.This prototype showcased a typical repetitio

关 键 词：激光器 锁模激光 皮秒脉冲 重复频率锁定 环境温度 

分 类 号：O436[机械工程—光学工程]