采用周期极化掺镁铌酸锂晶体作为光学参量振荡器, 在声光(A-O)调Q的1064 nm抽运光作用下, 获得了信号光和闲频光的调谐输出。实验中, 在极化周期为29.0～31.5 μm,温度范围为30～180 ℃内, 得到了信号光在1450.2～1839 nm范围内的准连续调谐输出, 其范围覆盖了光纤通信的S+C+L+U波段, 相应的闲频光调谐范围为2909～3990 nm。当注入抽运功率为830 mW时, 获得的信号光最大输出功率为139.7 mW, 光-光转换效率为16.8%, 最低激射阈值为88 mW。该可调谐光源基本达到了光纤通信系统的功率实用化水平。

Temperature-tuned and domain-tuned signal-resonated optical parametric oscillator based on multi-grating periodically poled Mgo-doped lithium niobate and pumped by an acousto-optically (A-O) Q-switched 1064 nm NdYVO4 laser was studied experimentally. The signal wave of 1450～1839 nm could be obtained with poled periods varying from 29.0～31.5 μm and temperature varying from 30～180℃, covering the S+C+L+U wave bands of optical fiber communications, and the range of corresponding idler-wave was 2909～3990 nm. When the pump power was 830 mW, the maximal output power of signal wave was 139.7 mW, the conversion efficiency was 16.8%, and the lowest lasing threshold was 88 mW. The tunable light source has reached the practical power level of optical communications system.