实验研究了具有单斜独居石结构的钒酸镧(m-LaVO4)晶体的室温拉曼光谱, 报道了基于 m-LaVO4晶体作为拉曼增益介质的主动调Q内腔式脉冲拉曼激光器。受激拉曼变频实验以波长为808 nm的光纤耦合半导体激光器(LD)作为抽运激发光源, Nd∶YAG晶体为产生基频激光的增益介质, 融石英声光调Q器为主动调Q元件, 采用紧凑的法布里-珀罗两镜平凹谐振腔可有效地产生波长为1170.9 nm的一阶斯托克斯脉冲激光。当注入抽运功率为6.51 W, 脉冲重复频率为30 kHz时, 实验产生的一阶斯托克斯脉冲激光的最高平均功率为767 mW, 相应的脉冲宽度为13.8 ns, 单脉冲能量为25.6 μJ, 峰值功率为1.85 kW。

We investigate the room-temperature Raman spectrum of monoclinic monazite-type LaVO4 (m-LaVO4) crystal and report a diode end-pumped intracavity actively Q-switched m-LaVO4 Raman laser. In this experiment, a fiber-coupled diode laser (LD) with a wavelength of 808 nm is used as a pumping excitation source, a Nd∶YAG crystal is used as a gain medium for generating a fundamental-frequency laser, and a quartz-acoustic-acoustic Q-switch is used as an active Q-switched component. A compact Fabry-Perot cavity composed by two Fabry-Perot mirrors produces a first-order Stokes pulsed laser with a wavelength of 1170.9 nm. When the input pump power is 6.51 W and the pulse repetition frequency is 30 kHz, the experiment produces the first-order Stokes laser with a maximum average power of 767 mW, the corresponding pulse width of 13.8 ns, the single pulse energy of 25.6 μJ and the peak power of 1.85 kW.