中文摘要

本文设计了一种在850 nm附近的具有平坦色散的光子晶体光纤，850 nm是光纤通信三个低损耗窗口之一，本文对研究光纤通信具有重要意义。首先系统介绍了光子晶体光纤的概念、各项特性以及应用前景等，然后对光子晶体光纤色散的计算进行了理论说明，接着讲述了如何利用COMSOL Multiphysics软件的RF(射频)模块对光子晶体光纤进行仿真设计，通过改变空气孔的排列和大小可以设计不同的光子晶体光纤，利用软件仿真求得基模有效折射率，并结合MATLAB软件进行数据处理，得出该种光纤的色散系数随输入波长的变化关系曲线。

关键词：光子晶体光纤，COMSOL Multiphysics，色散平坦

ABSTRACT

In this paper, a kind of near 850 nm with abnormal dispersion of plain photonic crystal fiber, 850 nm optical fiber communications is one of three low loss window, the research has important significance to optical fiber communication. This article first introduces the concept of photonic crystal fiber properties and the application prospect of, and then the photonic crystal fiber dispersion of the calculation of the theoretical instructions, then tells the story of how to use COMSOL Multiphysics software of RF module of photonic crystal fiber simulation design, through the change in the air hole configuration and size can design different photonic crystal fibers, using the software of the basement membrane for effective refractive index, and combined with MATLAB software and data processing, concluded that the fiber dispersion coefficient with the input wavelength of the curve changes.

Key  Words：Photonic crystal fiber, COMSOL Multiphysics, dispersion flattened