一种新结构光子晶体光纤的双折射特性研究

在普通正六边形光子晶体光纤的基础上,通过改变x轴方向空气孔的大小及分布构造了一种新结构的光子晶体光纤。利用多极法对该光子晶体基模的模场分布及双折射进行了数值计算,分析了光波长与结构参数对双折射的影响,同时对光子晶体光纤的色散特性进行了研究。结果表明,通过改变x轴方向空气孔的大小以及分布结构使光子晶体光纤比普通六边形结构光子晶体光纤的双折射率明显提高,并且具有较低的宽带反常色散,在光纤双折射效应的应用和光学器件的研制等方面具有独特的优势。

Study on Birefringence Properties of New Structural Photonic Crystal Fiber

The model of a kind of photonic crystal fiber(PCFs) is brought forward by changing the size and distribution of holes along the x-direction.The fundamental mode profile,birefringence,the influence of wavelength and structural parameters on birefringence,and the dispersions of PCF were simulated by multipole method.By comparisons,it can be concluded that the new photonic crystal fibers have larger birefringence than ordinary hexagonal photonic crystal fiber.It is also proved that one of these photonic crysta...