报道了利用高功率全固态连续单频1.06 μm激光器，抽运由准相位匹配晶体构成的单共振光学参量振荡器(SRO)，产生光束质量接近衍射极限的1.5 μm连续单频激光的实验研究。实验获得了输出功率为3.2 W的连续单频1.5 μm激光，光光转换效率达40%，SRO 的阈值抽运功率仅为2.5 W。当把SRO腔长主动锁定到共焦法布里珀罗(F-P)腔的共振峰上，信号光的频率稳定性优于3 MHz(1 min)、功率稳定性优于±0.5%(15 min)。该系统的激光波长位于量子态传输波段，可用于研究实用化量子信息处理系统。

A continuous-wave (CW) single-frequency 1.5 μm laser source is obtained by a singly resonant optical parametric oscillator (SRO) based on periodically poled lithium niobate. The SRO is pumped by a CW single-frequency NdYVO4 laser at 1.06 μm with the pump threshold of 2.5 W. 3.2 W of CW single-frequency signal laser at 1.5 μm is achieved at pump power of 8 W with the optical conversion efficient of 40%. When the SRO is actively locked to the centre frequency of a Fabry-Perot cavity, the power stability is better than ±0.5% in 15 minutes and frequency stability is better than 3 MHz in 1 minute. The center wavelength of the laser system is in the wave band of quantum states transmission, so this kind of system can be employed for researches of practical quantum information processing.