%0 Journal Article
%T Q-Switched Large-Mode-Area Yb-Doped Fibre Laser Using GaAs as Saturable Absorber
%A FU Sheng-Gui
%A GUO Zhan-Cheng
%A SI Li-Bin
%A ZHAO Ying
%A YUAN Shu-Zhong
%A DONG Xiao-Yi
%A <br>付圣贵
%A 郭占城
%A 司立彬
%A 赵颖
%A 袁树忠
%A 董孝义
%J 中国物理快报
%D 2007
%I 
%X 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.
%K 42
%K 55
%K Wd
%K 42
%K 60
%K Gd<br>激光
%K 掺杂
%K 光学纤维
%K 吸收材料
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=A6F1F92187EC7BB8E51FB2737000E07F&yid=A732AF04DDA03BB3&vid=B91E8C6D6FE990DB&iid=94C357A881DFC066&sid=8A87B19A95331EA5&eid=F58A98E9A761BF85&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0