简要分析了掺铥铝酸钇(Tm:YAP)晶体的能级结构及吸收光谱特性和磷化锗锌(ZGP)晶体的相位匹配特性，报道了一种在室温条件下工作的中红外光参量振荡器(OPO)。激光器输出的波长为3.88、4.00、4.14 μm，在脉冲频率为10 kHz时，最大输出功率为7.16 W，OPO抽运源到中波输出激光的光光转换效率为49.4%、斜率效率为48.9%。激光单脉冲宽度为81.47 ns，单脉冲能量为0.71 mJ，单脉冲峰值功率为8.78 kW，光束质量M2在X方向为3.8，Y方向为4.0。

The energy level diagram and absorption spectrum of Tm:YAP crystal and phase-matching properties of ZeGeP crystal are analyzed, and a middle-infrared optical parametric oscillator (OPO) under room temperature is presented. The wavelength of laser is 3.88, 4.00 and 4.14 μm, and the output power is 7.16 W at 10 kHz, the corresponding optical-optical conversion efficiency is up to 49.4%, and the slope efficiency is 48.9%. The single pulse width is 81.47 ns, the energy of single pulse is 0.71 mJ, the peak power of single pulse is 8.78 kW, the quality of middle infrared laser beam is 3.8(horizontal) and 4.0(vertical).