中国物理B ›› 2003, Vol. 12 ›› Issue (8): 886-889.doi: 10.1088/1009-1963/12/8/312

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Passive mode locking of a Nd:YAG laser with co-doped Nd, Cr:YAG as saturable absorber

冯宝华1, 张治国1, 杨林2, Gaebler Volker3, 刘百宁3, Eichler Hans3   

  1. (1)Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics Chinese Academy of Sciences, Beijing 100080, China; (2)Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics Chinese Academy of Sciences, Beijing 100080, China; State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China; (3)Optical Institute, Technical University Berlin, Str. d. 17. Juni 135,D-10623 Berlin, Germany
  • 收稿日期:2002-12-02 修回日期:2003-04-11 出版日期:2003-08-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60278024).

Passive mode locking of a Nd:YAG laser with co-doped Nd, Cr:YAG as saturable absorber

Yang Lin (杨林)ab, Feng Bao-Hua (冯宝华)a, Zhang Zhi-Guo (张治国)a, Gaebler Volkerc, Liu Bai-Ning (刘百宁)c, Eichler Hansc   

  1. a Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics Chinese Academy of Sciences, Beijing 100080, China; b State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China; c Optical Institute, Technical University Berlin, Str. d. 17. Juni 135,D-10623 Berlin, Germany
  • Received:2002-12-02 Revised:2003-04-11 Online:2003-08-16 Published:2005-03-16
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60278024).

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摘要： We demonstrate the characteristics of relatively low saturation intensity using co-doped Nd, Cr:YAG as saturable absorber for passively mode locking the Nd:YAG laser. The difference of the saturation intensity between Q-switched and mode-locked operation in co-doped Nd, Cr:YAG was only one to two orders of magnitude, while Cr:YAG was generally reported at a difference of five orders of magnitude. More than 80% mode locking modulation depth was achieved at an incident pump power of 4.4W, corresponding to an intracavity intensity of 6×10^4W/cm^2, using a 68cm long plano-concave cavity.

Abstract: We demonstrate the characteristics of relatively low saturation intensity using co-doped Nd, Cr:YAG as saturable absorber for passively mode locking the Nd:YAG laser. The difference of the saturation intensity between Q-switched and mode-locked operation in co-doped Nd, Cr:YAG was only one to two orders of magnitude, while Cr:YAG was generally reported at a difference of five orders of magnitude. More than 80% mode locking modulation depth was achieved at an incident pump power of 4.4W, corresponding to an intracavity intensity of $6×10^4$W/cm$^2$, using a 68cm long plano-concave cavity.

Key words: Nd, Cr:YAG crystal, passive mode locking, saturable absorber

中图分类号:  (Q-switching)

  • 42.60.Gd
42.60.Fc (Modulation, tuning, and mode locking) 42.55.Rz (Doped-insulator lasers and other solid state lasers)