中国物理B ›› 2005, Vol. 14 ›› Issue (11): 2338-2341.doi: 10.1088/1009-1963/14/11/033

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Design and fabrication of triangular inner cladding double-clad ytterbium doped fibre for high power lasers

傅永军, 简伟, 郑凯, 延凤平, 常德远, 简水生   

  1. Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China
  • 收稿日期:2005-03-04 修回日期:2005-05-30 出版日期:2005-11-20 发布日期:2005-11-20
  • 基金资助:
    Project supported by the project of National High Technology Research and Development Program of China (Grant Nos 2001AA312230 and 2004AA31g200).

Design and fabrication of triangular inner cladding double-clad ytterbium doped fibre for high power lasers

Fu Yong-Jun (傅永军), Jian Wei (简伟), Zheng Kai (郑凯), Yan Feng-Ping (延凤平), Chang De-Yuan (常德远), Jian Shui-Sheng (简水生)   

  1. Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China
  • Received:2005-03-04 Revised:2005-05-30 Online:2005-11-20 Published:2005-11-20
  • Supported by:
    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 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.

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.

Key words: ytterbium, triangular inner cladding, high power fibre laser

中图分类号:  (Fabrication, cladding, and splicing)

  • 42.81.Bm
42.55.Wd (Fiber lasers) 42.60.By (Design of specific laser systems)