中国物理B ›› 2007, Vol. 16 ›› Issue (2): 478-484.doi: 10.1088/1009-1963/16/2/032

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Design and fabrication of Panda-type erbium-doped polarization-maintaining fibres

郑凯, 常德远, 傅永军, 魏淮, 卫延, 延凤平, 娄淑琴, 宁提纲, 简伟, 简水生   

  1. Institute of Lightwave Technology, Beijing Jiaotong University，Beijing 100044, China
  • 收稿日期:2006-04-28 修回日期:2006-08-10 出版日期:2007-02-20 发布日期:2007-02-20
  • 基金资助:
    Project supported by the National High Technology Research and Development Program of China (Grant Nos 2002AA312190 and 2004AA31g200).

Design and fabrication of Panda-type erbium-doped polarization-maintaining fibres

Zheng Kai(郑凯)†, Chang De-Yuan(常德远), Fu Yong-Jun(傅永军), Wei Huai(魏淮), Wei Yan(卫延), Yan Feng-Ping(延凤平), Lou Shu-Qin(娄淑琴), Ning Ti-Gang(宁提纲), Jian Wei(简伟), and Jian Shui-Sheng(简水生)   

  1. Institute of Lightwave Technology, Beijing Jiaotong University，Beijing 100044, China
  • Received:2006-04-28 Revised:2006-08-10 Online:2007-02-20 Published:2007-02-20
  • Supported by:
    Project supported by the National High Technology Research and Development Program of China (Grant Nos 2002AA312190 and 2004AA31g200).

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摘要： To obtain the stable operation of erbium-doped fibre laser, the simple and ideal technology is adopted by use of the erbium doped polarization maintaining fibre (EDPMF). The design criteria of the Panda-type EDPMF are presented, which take into account the cutoff wavelength, mode field diameter, modal birefringence and background loss. Four groups of optimum structural parameter combinations are determined in terms of the design criteria. Two kinds of the Panda-type EDPMFs are selected to be fabricated. The fabrication process and the parameter control of the Panda-type EDPMFs are presented in detail. Their refractive index profiles, birefringence and absorption spectra are experimentally investigated. The absorption coefficient of the EDPMF, whose core is co-doped with Bi, Ga, Al and Ge, is about 57.9dB/m at 1.53\mum. Co-doping Bi, Ga and Al can greatly increase the erbium concentration in the silica-based fibre. The high birefringence is obtained for the Panda-type EDPMF. The group birefringence of the EDPMF, whose outer cladding diameter is 125\mum, is about 4.8\ti10-4.

关键词: erbium-doped fibre, polarization-maintaining fibre, birefringence, absorption coefficient

Abstract: To obtain the stable operation of erbium-doped fibre laser, the simple and ideal technology is adopted by use of the erbium doped polarization maintaining fibre (EDPMF). The design criteria of the Panda-type EDPMF are presented, which take into account the cutoff wavelength, mode field diameter, modal birefringence and background loss. Four groups of optimum structural parameter combinations are determined in terms of the design criteria. Two kinds of the Panda-type EDPMFs are selected to be fabricated. The fabrication process and the parameter control of the Panda-type EDPMFs are presented in detail. Their refractive index profiles, birefringence and absorption spectra are experimentally investigated. The absorption coefficient of the EDPMF, whose core is co-doped with Bi, Ga, Al and Ge, is about 57.9dB/m at 1.53$\mu$m. Co-doping Bi, Ga and Al can greatly increase the erbium concentration in the silica-based fibre. The high birefringence is obtained for the Panda-type EDPMF. The group birefringence of the EDPMF, whose outer cladding diameter is 125$\mu$m, is about 4.8$\times$10-4.

Key words: erbium-doped fibre, polarization-maintaining fibre, birefringence, absorption coefficient

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.60.By (Design of specific laser systems) 42.81.Bm (Fabrication, cladding, and splicing) 42.81.Gs (Birefringence, polarization)