Author Affiliations
Abstract
1 Research Center of Laser Physics and Technology, Key Laboratory of Functional Crystal and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2 Key Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3 Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
A passively mode-locked grown-together composite YVO4/Nd:YVO4 crystal laser is demonstrated with a semiconductor saturable absorber mirror by 880-nm laser-diode direct pumping. Under the absorbed pump power of 24.9 W, a maximum output power of 10.5 W at the repetition rate of 77 MHz is obtained, corresponding to the optical-optical conversion efficiency of 42.1% and the slope efficiency of 53.4%. The pulse width measured is 33 ps at the output power of 10 W.
生长键合YVO4/Nd:YVO4晶体 直接泵浦 锁模 半导体可饱和吸收镜 140.3480 Lasers, diode-pumped 140.3580 Lasers, solid-state 140.4050 Mode-locked lasers 160.3380 Laser materials Chinese Optics Letters
2011, 9(4): 041405
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
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。
激光器 皮秒激光 Nd∶YVO4放大器 Nd∶YAG放大器 二极管抽运
