中波红外OPO作为一种宽频可调谐激光光源已被广泛应用于激光雷达、光谱学及毒气侦测等领域。在光谱学、毒气侦测等应用领域，中波红外OPO在具有较高功率的同时，还应具有较窄的线宽和一定的调谐范围，从而提高对光谱及毒气分子的分辨能力。目前获得窄线宽OPO常用的光谱元件窄化法和种子注入法无法使OPO同时具备高效率、窄线宽、宽调谐特性。而OPO作为一种频率转换器件，其泵浦光特性将直接影响OPO参量光效率、线宽等特性。本课题首次提出以2.13µm脉冲单频激光泵浦ZGP-OPO，压窄ZGP-OPO参量光线宽，从根本上改善ZGP-OPO参量光光谱特性。通过优化2.13µm脉冲单频Ho:YAP激光器结构及参数，提升ZGP-OPO窄线宽脉冲泵浦源整体性能；进而通过谐振腔结构、泵浦耦合系统等的优化设计实现ZGP-OPO高效率、宽调谐、窄线宽中波红外激光输出，以期为光谱学、毒气侦测等领域提供一种性能优良的研究工具。

As a wide broadband tunable laser source, the Mid-Infrared Optical Parametric Oscillator (OPO) laser has widely applications in laser radar, spectroscopy, and gas detection. In some special application fields, such as, spectroscopy and gas detection, the Mid-Infrared OPO should possess not only high power, but also narrow-linewidth and a wide tuning range, which can improve the resolving ability of the system for spectrum and gas molecular. At present, the linewidth of OPO was narrowed by spectrum element or injection-seeded method which can not achieve the OPO in producing laser with high power, narrow-linewidth, and wide tuning, simultaneously. As a kind of frequency conversion devices, the conversion efficiency and linewidth of the parameter light of the OPO are directly influenced by the output performance of the pump. In this research, we propose to employ the 2.13 µm pulsed single frequency laser pump ZGP-OPO at the first time, which can narrow the linewidth of the ZGP-OPO parameter and thus fundamentally improve its spectral characteristic. To improve the output performance of the ZGP-OPO pumping source, we optimized the configuration and parameters of the 2.13 µm pulsed single frequency Ho:YAP laser. We optimized the design of the resonator configuration and the pump coupling system to achieve the OPO laser output with high efficiency, wide tuning, and narrow linewidth. We hope that the OPO pumped by 2.13 µm pulsed single frequency laser will be a high performance research tool in the spectroscopy and gas detection applications.