中国物理B ›› 2006, Vol. 15 ›› Issue (8): 1838-1842.doi: 10.1088/1009-1963/15/8/035

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Design and analysis of a kind of large flattened mode optical fibre

赵楚军, 彭润伍, 唐志祥, 叶云霞, 范滇元   

  1. Shanghai Institute of Optics and Fine mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2005-12-23 修回日期:2006-03-20 出版日期:2006-08-20 发布日期:2006-08-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10576012 and 60538010).

Design and analysis of a kind of large flattened mode optical fibre

Zhao Chu-Jun(赵楚军)†, Peng Run-Wu(彭润伍), Tang Zhi-Xiang(唐志祥), Ye Yun-Xia(叶云霞), and Fan Dian-Yuan(范滇元)   

  1. Shanghai Institute of Optics and Fine mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2005-12-23 Revised:2006-03-20 Online:2006-08-20 Published:2006-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10576012 and 60538010).

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摘要： In this paper, a refractive index profile design enabling us to obtain a flat modal field around the fibre centre is investigated. The theoretical approach for designing such multilayer large flattened mode (LFM) optical fibres is presented. A comparison is made between the properties of a three-layer LFM structure and a standard step-index profile with the same core size. The obtained results indicate that the effective area of the LFM fibre is about twice as large as that of the standard step-index fibre, but the LFM fibre has less effective ability to filter out the higher order modes than the standard step-index fibre with the same bending radius.

Abstract: In this paper, a refractive index profile design enabling us to obtain a flat modal field around the fibre centre is investigated. The theoretical approach for designing such multilayer large flattened mode (LFM) optical fibres is presented. A comparison is made between the properties of a three-layer LFM structure and a standard step-index profile with the same core size. The obtained results indicate that the effective area of the LFM fibre is about twice as large as that of the standard step-index fibre, but the LFM fibre has less effective ability to filter out the higher order modes than the standard step-index fibre with the same bending radius.

Key words: LFM optical fibre, nonlinear effects, effective area, bending loss

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.60.By (Design of specific laser systems) 42.81.Dp (Propagation, scattering, and losses; solitons)