全反射光子晶体光纤特性分析

通过引入几个较大空气轴，设计了几种全反射光子晶体光纤（toatl internal reflection photonic fiber）．运用平面波展开法（plane-wave expansion method）和频域有限差分方法（finite-difference frequency—domain method）对它们的约束模式、有效折射率和归一化频率等特性进行了分析．结果表明当第一圈填充率（d／A）改变时其约束模式、有效折射率和归一化频率有明显的变化，对设计低损耗光纤有一定的作用．

The Characteristics of the Total Internal Reflection Photonic Fiber

We propose a novel design of total internal reflection photonic fiber. It is designed by introducing a new defect, several bigger high-index rods, in the cladding of a conventional total internal reflection photonic fiber. Using the plane-wave expansion method and the finite-different frequency-domain method , analyze the confine mode and the effective index. The numerical results show that when the first-ring was changed, the properties of confine mode and the effective index had bovious changes. This will have some role in the designing the low loss fiber.