中文摘要：

研究了布拉格光纤结构对光传输特性的影响。对等周期结构的径向分布、高低折射率径向包层分布和准周期径向分布等布拉格光纤结构建立了光子晶体光纤仿真软件，对光场振幅三维分布、轴向传输流分布以及径向包层数对传输特性的影响进行了计算机仿真研究，研究结果对布拉格光子晶体光纤的实际加工具有重要的参考意义。

英文摘要：

The light propagation characteristics which are influenced by Bragg fiber structures have been researched in this paper. A simulation software has been set up to analyze three kinds of Bragg fiber structures,Which includes：（1） equal periodic radial cladding medium structure; （2） high and low refraction index media cladding distribution; （3） pseud-periodic radial cladding medium structure. Three dimensional field distributions, flux distributions, and the light propagation characteristics which are influenced by the number of radial cladding layers for high and low refraction index media have been researched by computer simulation.