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

作　　者：傅永军 简伟 郑凯 延凤平 常德远 简水生 

机构地区：[1]Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China

出　　处：《Chinese Physics B》2005年第11期2338-2341,共4页中国物理B（英文版）

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.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.

关 键 词：YTTERBIUM triangular inner cladding high power fibre laser 

分 类 号：TN24[电子电信—物理电子学]