基于ZnGeP2光参量振荡器的长波红外双波段调谐实验研究  

Experimental study on tunable characteristics of optical parametric oscillator based on ZnGeP;in long-infared dual-band

作　　者：孟冬冬 乔占朵 高宝光 王天齐 樊仲维 Meng Dongdong;Qiao Zhanduo;Gao Baoguang;Wang Tianqi;Fan Zhongwei(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5期198-204,共7页Infrared and Laser Engineering

基　　金：国家重点研发计划(2021YFB3602600)。

摘　　要：文中报道了一种基于ZnGeP;(ZGP)的纳秒宽调谐长波红外光参量振荡器(optical parametric oscillation,OPO)。采用重复频率50 Hz、脉冲宽度小于10 ns的1064 nm基频光泵浦基于Ⅱ类相位匹配KTP的光参量振荡器产生2.1μm激光,进而泵浦基于Ⅰ类相位匹配的ZGP光参量振荡器产生7~11μm长波红外输出。通过对ZGP的角度调谐获得了2.815~2.963μm连续可调谐信号光,对应闲频光波长连续可调谐范围为7.82~9.08μm。通过泵浦波长调谐的方式,当采用2107.13~2153.95 nm范围内的激光泵浦ZGP-OPO,获得了信号光波长范围为2.624~2.662μm和2.745~2.956μm的连续可调谐输出,对应闲频光范围为7.94~9.07μm和10.20~10.82μm。闲频光波长为8.03μm、能量为0.8 mJ时,ZGP-OPO的泵浦光至闲频光转换效率9.4%。A widely tunable long-infrared optical parametric oscillator(OPO)based on ZnGeP;(ZGP)with nanosecond pulses output in dual bands was reported in this paper.As a fundamental laser of ZGP-OPO,KTP-OPO of 2.1μm based on typeⅡphase match was pumped by 1064 nm fundamental delivering<10 ns pulses at50 Hz.Furthermore,the ZGP-OPO of 7-11μm based on typeⅠphase match was designed.Continuous-tunable signal wavelengths of 2.815-2.963μm corresponding idle wavelengths of 7.82-9.08μm was obtained using angle tuning of ZGP.Continuous-tunable signal wavelengths of 2.624-2.662μm and 2.745-2.956μm,which correspond the idle wavelengths of 7.94-9.07μm and 10.20-10.82μm respectively,were obtained using pump wavelengths tuning.The single-pulse energy was 0.8 mJ at 8.03μm,pump to idler conversion efficiency was 9.4%.

关 键 词：光参量振荡器 长波红外激光 连续可调谐 双波段 

分 类 号：TN248.1[电子电信—物理电子学]