报道了基于非临界相位匹配磷酸钛氧铷晶体(RTP)的光参量振荡激光性能研究。采用激光二极管端面抽运Nd:YAP激光晶体，组成内腔式RTP-OPO系统，对比了在不同声光调Q重复频率下的信号光输出特性。在20 kHz重复频率和13.1 W的抽运入射功率下，获得平均功率1.1 W的1.65 μm人眼安全激光的输出，光-光转化效率为8.4%；在重复频率为5 kHz时，获得了最窄脉4.4 ns，最高单脉冲峰值功率30.8 kW。结果表明，基于RTP晶体的OPO变频是获得1.6 μm波段激光的一种有效新途径。

The performance of the optical parametric oscillator was reported, which was based on the non-critical phase matching of the arsenic acid potassium titanium oxide (RTP) crystal. The intra-cavity RTP-OPO system was driven by the LD end pumped Nd:YAP laser. The output characteristics of the signal light were compared at the different pulse repetition rates of the acousto-optic Q-switcher. The 1.65 μm eye-safety laser was obtained when the incident diode pump power of 13.1 W and the pulse repetition frequency of 20 kHz, the maximum average output power was up to 1.1 W and which was achieved with the conversion efficiency of 8.4%. The shortest pulse width of 4.4 ns and the highest peak power of 30.8 kW were obtained when the pulse repetition rate was 5 kHz. The results show that the RTP crystal with the OPO frequency conversion system is a new way to get 1.6 μm wavelength laser.