设计并研制了全固态连续单频1.34 μm Nd:YVO4环形激光器。利用880 nm激光二极管双端端面偏振抽运Nd:YVO4晶体，通过腔镜镀膜抑制1.06 μm激光振荡和环形激光谐振腔的设计优化使激光器稳定单向行波运转，实验获得了输出功率达9 W的连续单频1.34 μm激光输出，光-光转换效率达18%。激光器在4 h内的功率稳定性优于±1%，在1 min内的频率漂移为8.5 MHz，输出激光的光束质量M2因子为1.03。

An all-solid-state continuous-wave (CW) single-frequency 1.34 μm Nd:YVO4 laser is designed and fabricated. Based on a polarized and dual-end pumping scheme, a Nd:YVO4 crystal is directly pumped by an 880 nm laser diode, the 1.06 μm laser is suppressed by the coating of cavity mirrors, and a ring resonator is designed. The measured maximum output power of 9 W at 1.34 μm is obtained with optical-optical conversion efficiency of 18%. The stability of the output power is better than ±1% over a period of 4 h and the frequency shift is less than 8.5 MHz in 1 min. The output beam is almost diffraction limited with a measured beam quality of M2=1.03.