基于光参量振荡的35kHz中红外激光器研究  

Research on mid-infrared laser at 35kHz based on optical parametric oscillator

作　　者：蒋星晨 程德华 李业秋[1,2] 崔建丰 岱钦[1,2] Jiang Xingchen;Cheng Dehua;Li Yeqiu;Cui Jianfeng;Dai Qin(School of Science,Shenyang Ligong University,Shenyang 110159,China;Technology Innovation Center of High Performance Laser and Application,Liaoning Province,Shenyang 110159,China)

机构地区：[1]沈阳理工大学理学院,辽宁沈阳110159 [2]辽宁省高性能激光器及应用专业技术创新中心,辽宁沈阳110159

出　　处：《红外与激光工程》2022年第9期192-196,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(61705145);辽宁省高等学校创新人才支持计划(LR2016079);辽宁省自然科学基金(20180550330);沈阳理工大学科研创新团队建设项目(SYLUTD2020);沈阳理工大学高水平成果建设计划。

摘　　要：研究了基于高重频1 064 nm激光泵浦的3.8μm周期性极化铌酸锂(periodically poled LiNbO, PPLN)光参量振荡器(optical parametric oscillator, OPO)。采用Nd:YVO声光调Q激光器,获得了光束质量良好,重复频率25~35 kHz,最大平均输出功率6.1 W,脉冲宽度59.1 ns的1 064 nm基频激光。模拟分析了在1 064 nm激光泵浦下,极化周期Λ=29.5μm MgO:PPLN晶体的温度调谐特性。通过实验,在25~200℃的温度范围内,获得了3 599.6~3 845.5 nm连续变化的中红外激光。当PPLN晶体温度为30℃,基频光功率为6.1 W时,得到了最大输出功率0.45 W,重复频率为35 kHz的3 845.5 nm中红外光输出。A 3.8 μm periodically poled LiNbOoptical parametric oscillator based on high repetition frequency pumping is studied. The Nd:YVOacousto-optic Q-switched laser is used, obtaining a fundamental1 064 nm laser with good beam quality, the repetition frequency at 25-35 kHz, the maximum average power of 6.1 W and the pulse width of 59.1 ns. The temperature tuning characteristic of MgO:PPLN crystal with the periodΛ=29.5 μm under the 1 064 nm laser pumping is simulated. Through experiments, the 3 599.6-3 845.5 nm mid-infrared laser is obtained at a temperature of 25-200 ℃. When the temperature of the PPLN crystal is 30 ℃and the pump power is 6.1 W, the mid-infrared laser is obtained with the maximum output power of 0.45 W and the repetition frequency of 35 kHz at 3 845.5 nm.

关 键 词：高重频 中红外 周期性极化铌酸锂 光参量振荡器 

分 类 号：O436[机械工程—光学工程]