| Design and fabrication of triangular inner cladding double-clad ytterbium doped fibre for high power lasers |
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| 作者姓名： | 傅永军 简伟 郑凯 延凤平 常德远 简水生 |
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| 作者单位： | Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China;Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China;Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China;Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China;Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China;Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China |
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| 基金项目： | Project supported by the project of National High Technology Research and Development Program of China (Grant Nos 2001AA312230 and 2004AA31g200). |
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| 摘 要： | To improve the performance of double clad high power fibre lasers, inner cladding design plays a significant role. A triangular inner cladding and silica structure second cladding with large air holes go acquire high inner cladding numerical aperture are designed. Single mode and high power output of the fibre lasers need the double clad Yb doped fibre with large core. A fibre with annular refractive index distribution core and low numerical aperture to acquire a large mode area fibre core is designed and fabricated. Furthermore co-doping with aluminium （A1） has been used to improve the solubility of ytterbium （Yb） into silicate network, and the core absorption coefficients of two Yb doped fibres are compared with different A1 concentration experimentally.
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| 关 键 词： | 镱元素 三角内部覆层 高能激光 硅石结构 溶解性 吸收系数 |
| 收稿时间： | 3/4/2005 12:00:00 AM |
| 修稿时间： | 2005-03-042005-05-30 |
Design and fabrication of triangular inner cladding double-clad ytterbium doped fibre for high power lasers |
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| Fu Yong-Jun,Jian Wei,Zheng Kai,Yan Feng-Ping,Chang De-Yuan and Jian Shui-Sheng.Design and fabrication of triangular inner cladding double-clad ytterbium doped fibre for high power lasers[J].Chinese Physics B,2005,14(11):2338-2341. |
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| Authors: | Fu Yong-Jun Jian Wei Zheng Kai Yan Feng-Ping Chang De-Yuan and Jian Shui-Sheng |
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| Institution: | Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | To improve the performance of double clad high power fibre lasers, inner cladding design plays a significant role. A triangular inner cladding and silica structure second cladding with large air holes to acquire high inner cladding numerical aperture are designed. Single mode and high power output of the fibre lasers need the double clad Yb doped fibre with large core. A fibre with annular refractive index distribution core and low numerical aperture to acquire a large mode area fibre core is designed and fabricated. Furthermore co-doping with aluminium (Al) has been used to improve the solubility of ytterbium (Yb) into silicate network, and the core absorption coefficients of two Yb doped fibres are compared with different Al concentration experimentally. |
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| Keywords: | ytterbium triangular inner cladding high power fibre laser |
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