描述了一种可调谐全固态Nd:YVO4/LBO倍频连续671 nm环形激光器的结构参数和相关实验研究。激光器采用四镜环形腔结构，利用880 nm激光二极管(LD)端面抽运YVO4-Nd:YVO4复合晶体和Ⅰ类相位匹配的LBO倍频方式，加入TGG旋光器和λ/2波片组成的光学单向器实现单向运转，通过对法布里-珀罗(F-P)标准具角度和腔镜压电晶体电压的调节实现了激光输出波长671 nm附近的调频。在抽运功率为23 W，吸收抽运功率为14.5 W时，输出单频671 nm连续红光最高功率为1.08 W,光-光转换效率为7.4%；加标准具调谐时，获得了最高功率为738 mW的可调谐红光输出。

A tunable all-solid-state Nd:YVO4 ring laser, intra-cavity frequency doubled by a type-Ⅰ matched LBO crystal with 671 nm laser output, is demonstrated in this paper. The laser resonator is designed with a four-mirror ring configuration. The YVO4-Nd:YVO4 composite crystal is end-pumped by a 880 nm laser diode (LD). A Faraday optical diode consisted with TGG rotator and half-wave plate is placed inside the resonator for forcing the laser to operate unidirectionally. A solid Fabry-Perot etalon and a piezoelectric-ceramic are inserted into the cavity for tuning the wavelength. The single-frequency output power of 1.08 W at 671 nm is obtained under the pumping power of 23 W (the absorbed pumping power of 14.5 W), the optical-optical conversion efficiency is about 7.4%. With the etalon tuning, a maximal output power of 738 mW is obtained.