报道了一种激光二极管(LD)端面连续抽运的高重复率电光调Q Nd:YVO₄激光器。采用新型电光晶体La3Ga5SiO14(LGS)作为调Q元件,并设计高效稳定谐振腔,实现了最高30 kHz的高重复率电光调Q运转。使用透射率为50%的输出镜,在5 kHz重复率运转时,获得了单脉冲能量0.4 mJ,脉宽6.3 ns的脉冲序列输出;当重复率达30 kHz时,得到的单脉冲能量为0.2 mJ,脉宽9.1 ns,最大平均功率6.2 W,斜率效率为32.7%,调Q动静比达83%,光束传输因子M2＜2。实验结果表明,该激光器输出功率并没有出现饱和现象,具有进一步提升的空间。

An electro-optic (EO) Q-switched Nd:YVO₄ laser with high repetition rate of 30 kHz,end-pumped by a continuous-wave (CW) laser diode (LD) is reported. Using La3Ga5SiO14(LGS) single crystal as an EO Q-switch and designing an efficient and stable resonator,the repetition rate of EO Q-switched operation can be changed from 1 Hz to 30 kHz. Using an output coupler with transmittance of 50%,an output pulse train with pulse energy of 0.4 mJ and pulse width of 6.3 ns is obtained at the repetition rate of 5 kHz. An average output power of 6.2 W with the pulse width of 9.1 ns is obtained when the repetition rate reaches 30 kHz,the slope efficiency and dynamic to static ratio are 32.7% and 83%,respectively. The beam transfer factor M2 is measured to be less than 2. Experimental results show that the output level has great potential for further development.