摘要
设计了一种基于主振荡功率放大(MOPA)结构的激光二极管(LD)泵浦窄脉宽高功率固体激光器。主振荡级采用掺钕钒酸钇(Nd:YVO_(4))晶体作为激光工作物质,结合磷酸钛氧铷电光调Q器件,分析了高重频激光脉宽特性,实现了主振荡级窄脉宽输出;功率放大级采用LD双端泵浦Nd:YVO_(4)晶体结构,通过建立三维热仿真模型,对比分析了LD单端泵浦和LD双端泵浦激光工作物质的热效应,并讨论了在双端泵浦条件下,LD泵浦光斑、激光工作物质长度等因素对功率放大级热效应的影响。在实验中优化激光器参数,主振荡功率放大后,当重复频率10 kHz时,得到了最大平均功率为22.01 W、脉冲宽度为4.33 ns的1064 nm激光输出,对应的光-光转换效率为18.21%。
A laser diode(LD)pumped,narrow-pulse-width,high-power solid-state laser was designed using a master oscillator power amplifier(MOPA)configuration.The master oscillator stage utilizes a neodymium-doped yttrium orthovanadate(Nd:YVO_(4))crystal as the laser gain medium in combination with a rubidium titanyl phosphate(RTP)electro-optic Q-switch.The pulse width characteristics at high repetition rates were analyzed,yielding narrow pulse width output from the master oscillator stage.The power amplifier stage employes a configuration that features LD dual-end pumping of the Nd:YVO_(4) crystal.A three-dimensional thermal simulation model was established to comparatively analyze the thermal effects in the gain medium under LD single-end and dual-end pumping.The influence of LD pump spot size and gain medium length on thermal effects in the power amplifier stage under dual-end pumping was investigated.Following experimental optimization of the laser parameters,the MOPA system achieved a maximum average power of 22.01 W with a pulse width of 4.33 ns at a wavelength of 1064 nm and a repetition frequency of 10 kHz.The corresponding optical-to-optical conversion efficiency was 18.21%.
作者
黄振鸿
蔡宏川
王磊
李业秋
崔建丰
岱钦
HUANG Zhenhong;CAI Hongchuan;WANG Lei;LI Yeqiu;CUI Jianfeng;DAI Qin(College of Science,Shenyang Ligong University,Shenyang 110159,CHN;College of Mechanical Engineering,Shenyang Ligong University,Shenyang 110159,CHN;Fudong Machinery Factory,Fushun 113105,CHN)
出处
《半导体光电》
北大核心
2025年第4期680-686,共7页
Semiconductor Optoelectronics
基金
国家重点研发计划(2022YFB4601603)
2022年辽宁省“揭榜挂帅”科技计划重点项目
沈阳理工大学光选科研团队建设项目。
关键词
激光器
热效应
窄脉宽
高重频
主振荡功率放大
laser device
thermal effect
narrow pulse width
high repetition rate
master oscillator power amplifier
