一种高双折射光子晶体光纤的特性研究  

Research on the Characteristic of a High Birefringent Photonic Crystal Fiber

作　　者：于程程 励强华[1] 谷芊志 张金辉 Yu Chengcheng;Li Qianghua;Gu Qianzhi;Zhang Jinhui(Harbin Normal Universit)

机构地区：[1]哈尔滨师范大学

出　　处：《哈尔滨师范大学自然科学学报》2018年第2期82-86,共5页Natural Science Journal of Harbin Normal University

基　　金：黑龙江省自然科学基金(ZD201401)

摘　　要：设计了一种新型光子晶体光纤,通过数值模拟,该种光子晶体光纤具有高双折射特性,且具有较高的非线性特性,并且在0.8到1.8μm波段出现了两个零色散点.该种光子晶体光纤结构包层的空气孔的排列方式为按照三角晶格排列,并将其中部分圆形空气孔变为椭圆形空气孔.运用全矢量有限元法对其光学特性进行理论模拟分析,分析结果表明:当椭圆率η=4/7,占空比d/Λ=0.45时,在波长1.55μm处,获得了3.88×10-2的高双折射.非线性系数可达67.5 km-1·W-1.In this paper,a photonic crystal optical fiber with high birefringence and high nonlinear and double zero dispersion wavelength is designed. The structure is a circular air hole arranged in triangular lattice,which changes the ellipticity of some circular air holes to obtain high birefringence characteristics.The optical characteristics of this paper are analyzed by using the whole vector finite element method. The resuls show that when η = 4/7,d/Λ = 0.45,the birefringence of 3.88 × 10-2 is obtained at the wavelength of1.55μm,and the nonlinear coefficients is 67.5 km-1·W-1. This photonic crystal fiber has a wide application prospect in 1.55μm band.

关 键 词：光子晶体光纤 有限元法 有效折射率 双折射 色散特性 

分 类 号：O734[理学—晶体学]