摘要
介绍了一种基于半导体激光器(laser diode,LD)侧面泵浦的高重复频率、高能量纳秒主振荡功率放大器(master oscillator power amplifier,MOPA)系统的设计与优化。首先分析了LD侧面泵浦放大模块的热效应,然后提出了热分布不均匀的补偿方法。该方法有效地减轻了放大过程中热效应对光束质量的影响。最终在100 Hz的重复频率下,将振荡器产生9.6 mJ的脉冲能量放大到620 mJ,脉冲宽度为32 ns,光束质量因子M2为3.9,30 min内能量不稳定度(root mean square,RMS)为1.56%。
This paper presents the design and optimization of a high repetition rate,high-energy nanosecond master oscillator power amplifier(MOPA)system based on laser diode(LD)side-pumping.The thermal effects in LD side pumped amplifier modules are analyzed and the compensation of thermal distribution inhomogeneity is proposed.This approach effectively mitigates the impact of thermal effects on beam quality during amplification.At a repetition rate of 100 Hz,the oscillator produces the pulse energy of 9.6 mJ,which is amplified to 620 mJ with the pulse width of 32 ns.The beam quality factor M2 is measured as 3.9,and the root mean square(RMS)energy instability reaches 1.56%.
作者
李延
李鹏飞
李凯
吕志伟
王雨雷
LI Yan;LI Pengfei;LI Kai;LÜZhiwei;WANG Yulei(School of Electronics and Information Engineering,Hebei University of Technology,Tianjin 300401,China;Hebei Key Laboratory of Advanced Laser Technology and Equipment,Tianjin 300401,China)
出处
《河北工业大学学报》
2025年第6期18-24,共7页
Journal of Hebei University of Technology
基金
国家重点研发计划资助项目(2024YFB3613600)
河北省自然科学基金资助项目(F2023202082,F2022202035)。
关键词
主振荡功率放大器
高能量
高重复频率
高光束质量
高稳定度
master oscillator power amplifier
high energy
high repetition frequency
high beam quality
high stability
