基于纤芯折射率增强的高双折射光子晶体光纤

通过增加光纤纤芯区域折射率实现了一种高双折射光子晶体光纤.采用全矢量有限元和平面波展开方法，系统地研究了这种高双折射光子晶体光纤在不同的高折射率区域参数(比如区域形状、折射率)情况下的光纤特性.模拟结果表明,光子晶体光纤的双折射可以在优化的参数条件下获得很大提高，光子晶体光纤的非线性系数(连同双折射)也可以同时得到提高.

Highly Birefringent Photonic Crystal Fiber Based on Index-Enhanced Fiber Core

A highly birefringent photonic crystal fiber (PCF) was achieved by increasing the index of the fiber core region. A full-vector finite-element method and a plane-wave expansion method were employed and characteristics of this kind of PCF were fully investigated for different parameters of the high-index region such as the shape or the refractive index. Simulation results show that the birefringence of the PCF can be greatly improved under optimized parameters.And nonlinear coefficient (together with the birefringence) of the PCF can also be enhanced synchronously.