journal6 ›› 2006, Vol. 27 ›› Issue (6): 64-68.

• 物理与电子 • 上一篇    下一篇

高折射率芯Bragg光纤瑞利散射特性的数值分析

  

  1. (北京邮电大学电信工程学院,北京 100876)
  • 出版日期:2006-11-25 发布日期:2012-06-28
  • 作者简介:张方迪(1981-),男,安徽宿松人,北京邮电大学电信工程学院博士生,主要从事光子晶体光纤、光分组交换等研究.
  • 基金资助:

    国家自然科学基金资助项目(60372100;60507007)

Numerical Study on Rayleigh Scattering Property in High-Index-Core Bragg Fibers

  1. (School of Telecommunication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)
  • Online:2006-11-25 Published:2012-06-28

摘要:基于瑞利散射理论,运用全矢量有限元方法,分析了F掺杂以及GeO2掺杂高折射率芯Bragg光纤(HICBF)的瑞利散射特性.研究结果表明:对于F和GeO2这2种典型掺杂HICBF,光纤结构对瑞利散射损耗影响正好相反.GeO2掺杂HICBF的分析中还发现,在芯径一定的情况下,调整的包层结构可以使瑞利散射损耗降到最低.该结论同样适用于其他类似掺杂类型HICBF.

关键词: Bragg光纤, 瑞利散射, 瑞利散射系数, 有限元

Abstract: An analytical model for Rayleigh scattering in fibers is presented based on a full-vector finite element method (FEM) with edge/nodal hybrid element.By using this model,the Rayleigh scattering property of F-doped and GeO2-doped high-index-core bragg fibers (HICBF) is investigated.Numerical results show that the effects of fiber structure on Rayleigh scattering in F-doped HICBF are quite opposite to that in GeO2-doped HICBF.By adjusting the cladding structure,minimized Rayleigh scattering loss (RSL) can be obtained in GeO2-doped HICBF with a certain high-index core radius.Conclusion in this paper is also suitable for other doped HICBF.

Key words: Bragg fiber;rayleigh scattering, rayleigh scattering coefficient, finite element

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