光学学报, 2010, 30 (1): 137, 网络出版: 2010-02-01
高重复频率窄脉宽LGS电光调Q Nd:YVO4激光器
High Repetition Rate Short Pulse Width LGS Electro-Optic Q-Switched Nd:YVO4 Laser
摘要
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。
Abstract
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.
唐昊, 朱小磊, 孟俊清, 臧华国. 高重复频率窄脉宽LGS电光调Q Nd:YVO4激光器[J]. 光学学报, 2010, 30(1): 137. Tang Hao, Zhu Xiaolei, Meng Junqing, Zang Huaguo. High Repetition Rate Short Pulse Width LGS Electro-Optic Q-Switched Nd:YVO4 Laser[J]. Acta Optica Sinica, 2010, 30(1): 137.