| Q-Switched Large-Mode-Area Yb-Doped Fibre Laser Using GaAs as Saturable Absorber |
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| 作者姓名： | 付圣贵 郭占城 司立彬 赵颖 袁树忠 董孝义 |
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| 作者单位： | ollege of Information Technology Science, Nankai University, Tianjin 300071 |
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| 基金项目： | Supported by the National High-Technology and Development Programme of China under Grant No 2003CB314906, the Tianjin Natural Science Foundation Projects under Grant No 06YFJZJC00300, and the China Postdoctoral Science Foundation under Grant No 20060390666. |
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| 摘 要： | A passive Q-switched large-mode-area Yb-doped fibre laser is demonstrated using a GaAs wafer as the saturable absorber. A high Yb doping concentration double-clad fibre with a core diameter of 30μm and a numerical aperture of 0.07 is used to increase the laser gain volume, permitting greater energy storage and higher output power than conventional fibres. The maximum average output power is 7.2W at 1080nm wavelength, with the shortest pulse duration of 580ns and the highest peak power of 161W when the laser is pumped with a 25W diode laser operating at 976nm. The repetition rate increases with the pump power linearly and the highest repetition rate of 77kHz is obtained in the experiment.
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| 关 键 词： | 激光 掺杂 光学纤维 吸收材料 |
| 收稿时间： | 2006-11-16 |
| 修稿时间： | 2006-11-16 |
Q-Switched Large-Mode-Area Yb-Doped Fibre Laser Using GaAs as Saturable Absorber |
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| FU Sheng-Gui,GUO Zhan-Cheng,SI Li-Bin,ZHAO Ying,YUAN Shu-Zhong,DONG Xiao-Yi.Q-Switched Large-Mode-Area Yb-Doped Fibre Laser Using GaAs as Saturable Absorber[J].Chinese Physics Letters,2007,24(5):1264-1266. |
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| Authors: | FU Sheng-Gui GUO Zhan-Cheng SI Li-Bin ZHAO Ying YUAN Shu-Zhong DONG Xiao-Yi |
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| Affiliation: | College of Information Technology Science, Nankai University, Tianjin 300071 |
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| Abstract: | A passive Q-switched large-mode-area Yb-doped fibre laser is demonstrated using a GaAs wafer as the saturable absorber. A high Yb doping concentration double-clad fibre with a core diameter of 30#m and a numerical aperture of 0.07 is used to increase the laser gain volume, permitting greater energy storage and higher output power than conventional fibres. The maximum average output power is 7.2 W at 1080nm wavelength, with the shortest pulse duration of 580ns and the highest peak power of 161 W when the laser is pumped with a 25 W diode laser operating at 976nm. The repetition rate increases with the pump power linearly and the highest repetition rate of 77kHz is obtained in the experiment. |
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| Keywords: | 42 55 Wd 42 60 Gd |
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