摘要
通过带光纤耦合的激光二极管模块端面泵浦低掺杂浓度的Nd∶YVO4晶体,实现了高转换效率的TEM00模准连续绿光激光器。实验采用平平对称腔型设计以获得大的基模体积,高衍射效率声光调Q技术以提高峰值功率密度,以及LBO临界相位匹配来实现腔内倍频。在注入功率30W,重复频率20kHz的条件下,获得了平均功率为9.6W的532nm激光输出,实际光-光转换效率达到33.4%,相应的1064nm基频光平均输出功率为11.8W,实际倍频效率为89.8%。同时,测得532nm绿光的M2因子为1.09,脉冲宽度为28ns。文中还对影响绿光光束质量和转换效率的因素进行了分析。
A TEM00 operated quasi-CW Nd： YVQ/LBO green laser is presented by end-pumping the Nd： YVO4 crystal of 0. 3% Nd^3＋ using a laser-diode module. A symmetric cavity structure is used to design the laser to obtain the large TEMoo （fundamental mode） volume, the acoustic-optic Q-switching modulation technology is taken to improve the peak power density, and a I -type critical phase-matching LBO crystal is used to realize the intra-cavity doubling frequency in the laser operation. Experimental results indicate that the laser average output power is 9.6 W at 532 nm and the optical-optical conversion efficiency is 33.4% in a pump power of 30 W and a repetition frequency of 20 kHz. In correspondence with above, the average output power of the fundamental frequency is 11.8 W and the doubling frequency efficiency is 89. 8%. Moreover, experiments also obtain a pulse width of the green beam of 20 ns and a M2 factor of 1.09.
出处
《中国光学与应用光学》
2009年第4期358-363,共6页
Chinese Optics and Applied Optics Abstracts
基金
国家发改委产业化示范项目(No.20072456)
关键词
固体激光器
绿光激光器
光束质量
高转换效率
声光调Q
腔内倍频
solid-state laser
green laser
beam quality
high conversion efficiency
acoustic-optic Q-switching
intracavity frequency doubling
