高折射率芯Bragg光纤瑞利散射特性的数值分析  

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

作　　者：张方迪[1] 刘小毅[1] 张民[1] 叶培大[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《吉首大学学报（自然科学版）》2006年第6期64-68,共5页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(6037210060507007)

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.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 GeO2doped 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.

关 键 词：BRAGG光纤 瑞利散射 瑞利散射系数 有限元 

分 类 号：TN929.11[电子电信—通信与信息系统]