阐述了一种获得高功率3~5 μm 中红外激光输出的实验方案，即先通过高功率1.94 μm 光源抽运Ho:YLF 晶体，获得高重复频率2.05 μm 激光输出，通过端抽运放大方式，提升2.05 μm 激光功率水平，最终2.05 μm 激光抽运光参量振荡器(OPO)实现高功率中波激光输出。在水冷工作体制下获得了重复频率5 kHz、最大功率26.9 W 的中波输出，脉冲宽度为24.4 ns，2.05 μm 到3~5 μm 的光光转换效率达50%，通过角度调谐获得不同波长的中红外激光输出，验证了该实验方案作为一种获得高功率、高效率、高重复频率中红外激光输出工作方式的可行性。

A high power mid infrared (Mid-IR) laser is introduced. High frequency laser of 2.05 μm is obtained in Ho:YLF laser pumped by 1.94 μm laser, and the power of 2.05 μm laser is increased by amplifying in an endpumping schedule, finally, a high power Mid- IR laser is obtained in a OPO pumped by the 2.05 μm laser. The schedule is cooled by water,the max power of Mid- IR laser is up to 26.9 W, the pulse width is 24.4 ns, the efficiency from 2.05 μm to Mid- IR is up to 50% , and the wavelength is varied with the different input angle. Through the experience, it is proved that a high power, high frequency and high efficiency Mid-IR laser can be realized in this method.