| 基于ZnGeP2光参量振荡器的长波红外双波段调谐实验研究 |
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| 引用本文： | 孟冬冬,乔占朵,高宝光,王天齐,樊仲维.基于ZnGeP2光参量振荡器的长波红外双波段调谐实验研究[J].红外与激光工程,2022,51(5):2021G008-1-2021G008-7. |
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| 作者姓名： | 孟冬冬 乔占朵 高宝光 王天齐 樊仲维 |
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| 作者单位： | 1.中国科学院空天信息创新研究院，北京 100094 |
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| 基金项目： | 国家重点研发计划（2021YFB3602600） |
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| 摘 要： | 文中报道了一种基于ZnGeP2 (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2.1 μm激光，进而泵浦基于Ⅰ类相位匹配的ZGP光参量振荡器产生7~11 μm长波红外输出。通过对ZGP的角度调谐获得了2.815~2.963 μm连续可调谐信号光，对应闲频光波长连续可调谐范围为7.82~9.08 μm。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2.624~2.662 μm和2.745~2.956 μm的连续可调谐输出，对应闲频光范围为7.94~9.07 μm和10.20~10.82 μm。闲频光波长为8.03 μm、能量为0.8 mJ时，ZGP-OPO的泵浦光至闲频光转换效率9.4%。
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| 关 键 词： | 光参量振荡器 长波红外激光 连续可调谐 双波段 |
| 收稿时间： | 2022-01-21 |
Experimental study on tunable characteristics of optical parametric oscillator based on ZnGeP2 in long-infared dual-band |
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| Affiliation: | 1.The Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China2.School of Optoelectronics, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A widely tunable long-infrared optical parametric oscillator (OPO) based on ZnGeP2 (ZGP) with nanosecond pulses output in dual bands was reported in this paper. As a fundamental laser of ZGP-OPO, KTP- OPO of 2.1 μm based on type Ⅱ phase match was pumped by 1064 nm fundamental delivering <10 ns pulses at 50 Hz. Furthermore, the ZGP-OPO of 7-11 μm based on type Ⅰ phase match was designed. Continuous-tunable signal wavelengths of 2.815-2.963 μm corresponding idle wavelengths of 7.82-9.08 μm was obtained using angle tuning of ZGP. Continuous-tunable signal wavelengths of 2.624-2.662 μm and 2.745-2.956 μm, which correspond the idle wavelengths of 7.94-9.07 μm and 10.20-10.82 μm respectively , were obtained using pump wavelengths tuning. The single-pulse energy was 0.8 mJ at 8.03 μm, pump to idler conversion efficiency was 9.4%. |
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