基于MgO:PPLN的高重频、高峰值功率中红外光参量振荡器  

High repetition rate,high peak power mid-infrared optical parametric oscillator based on MgO:PPLN

作　　者：高宝光 孟冬冬 乔占朵 邱基斯 Gao Baoguang;Meng Dongdong;Qiao Zhanduo;Qiu Jisi(The Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;School of Optoelectronics,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]中国科学院大学光电学院,北京100049

出　　处：《红外与激光工程》2022年第10期116-121,共6页Infrared and Laser Engineering

基　　金：天津市重点研发计划(19YFZCGX00210)。

摘　　要：报道了一种基于周期性极化掺氧化镁铌酸锂晶体(MgO:PPLN)的高峰值功率、纳秒宽调谐中红外光参量振荡器(Optical parametric oscillation,OPO)。采用重复频率30~50 kHz、脉冲宽度小于4 ns的高光束质量1064 nm基频光泵浦基于极化周期为29μm MgO:PPLN的OPO,当MgO:PPLN温度为80℃时获得30 kHz、脉宽1.19 ns、峰值功率48.45 kW的3.93μm激光输出。在MgO:PPLN温度区间为50~200℃时,中红外调谐输出波长为3.77~3.96μm。根据实验结果分析讨论了不同重复频率下转换效率的特点、温度调谐特性与理论分析的一致性。A widely tunable mid-infrared optical parametric oscillator(OPO)with high peak power,nanosecond pulses output,which was based on MgO-doped periodically poled LiNbO3(MgO:PPLN)was reported in this paper.The MgO:PPLN OPO with a domain period of 29μm was pumped by a fundamental laser of 1064 nm with high beam quality,and the fundamental laser operated at the repetition rates from 30 kHz to 50 kHz with the pulses duration less than 4 ns.The 48.45 kW peak power,1.19 ns,and 30 kHz pulses at 3.93μm were obtained,as the temperature of MgO:PPLN was at 80℃.The tunable range of mid-infrared wavelength was from 3.77μm to 3.96μm,as the temperature of MgO:PPLN was from 50℃to 200℃.According to the experimental results,the characteristics of conversion efficiency and temperature tuning characteristics under different repetition rates were analyzed and discussed.

关 键 词：光参量振荡器 周期性极化掺氧化镁铌酸锂晶体 中红外激光器 高峰值功率 

分 类 号：TN248.1[电子电信—物理电子学]