中国激光, 2009, 36 (s1): 30, 网络出版: 2009-06-18  

Nd∶YVO4和Nd∶YAG混合放大皮秒激光器

Picosecond Laser System Combined with Nd∶YVO4 and Nd∶YAG Amplifiers
作者单位
1 长沙理工大学物理与电子科学学院, 湖南 长沙 410076
2 中国科学院物理研究所光物理实验室, 北京 100080
摘要
实验研制了端抽运Nd∶YVO4放大器和侧抽运Nd∶YAG放大器相结合的高功率高光束质量皮秒激光器。这一系统充分利用了Nd∶YVO4 晶体受激发射截面大和Nd∶YAG晶体热导率大的优点。端面抽运Nd∶YVO4放大器使振荡器输出的激光获得高增益而迅速放大, 随后的侧面抽运的Nd∶YAG激光模块放大器有利于大功率抽运从而得到高功率激光输出。侧抽运Nd∶YAG放大器采用了双程放大的方式设计, 利于提高放大器的效率。为保证光束质量和光束模式匹配, 在放大器之间设计了合适的空间滤波器。激光器输出平均功率43.4 W, 光束质量因子M2<1.7的皮秒激光。
Abstract
A high average power and high beam quality picosecond laser system combined with diode-end-pumped Nd∶YVO4 and laser diode-side-pumped Nd∶YAG amplifier is described. The system combines the advantages of Nd∶YVO4 crystal having large stimulated-emission cross section and Nd∶YAG crystal having good thermal conductivity. The diode-end-pumped Nd∶YVO4 amplifier allows the laser from the oscillator to obtain high gain so that the laser can amplify rapidly and the diode-side-pumped Nd∶YAG amplifier benefits to obtain high output power. The Nd∶YAG amplifier is designed as double-pass form to increase the efficiency of the amplifier. Spatial filters are adopted between amplifiers to ensure good beam quality and mode matching. Picosecond laser with average power of 43.4 W and good beam quality factor M2<1.7 is generated from this laser system.
参考文献

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彭润伍, 郭林, 张小富, 李芳琴, 崔前进, 薄勇, 彭钦军, 崔大复, 许祖彦, 唐立军. Nd∶YVO4和Nd∶YAG混合放大皮秒激光器[J]. 中国激光, 2009, 36(s1): 30. Peng Runwu, Guo Lin, Zhang Xiaofu, Li Fangqin, Cui Qianjin, Bo Yong, Peng Qinjun, Cui Dafu, Xu Zuyan, Tang Lijun. Picosecond Laser System Combined with Nd∶YVO4 and Nd∶YAG Amplifiers[J]. Chinese Journal of Lasers, 2009, 36(s1): 30.

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