一种基于As_2Se_3的微结构纤芯高双折射光子晶体光纤  

A Kind of Highly Birefringent Photonic Crystal Fiber with Micro-structured Core Based on As_2Se_3

作　　者：赵舜[1] 曹晏君 曹晔[1] 童峥嵘[1] 

机构地区：[1]天津理工大学薄膜电子与通信器件重点实验室,天津300384 [2]江南大学理学院,江苏无锡214064

出　　处：《南开大学学报（自然科学版）》2015年第2期64-68,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金(61107052);天津市高等学校科技发展基金计划(20110704)

摘　　要：提出了一种新型的基于As_2Se_3的高双折射光子晶体光纤(PCF).该PCF包层空气孔采用8边形排列,并在纤芯引入了左右各3个圆空气孔的微结构.采用全矢量有限元法(FEM),通过改变微结构纤芯中圆空气孔的直径及孔间距,研究了该光纤的双折射特性、损耗特性以及色散特性.结果表明,在波长1.55μm处,双折射高达1.56×10^(-1),说明该PCF具有良好的保偏特性;同时,y方向的限制损耗低至6.44278×10^(-9)dB/m;在波长1.3~2.0μm的区间内,色散曲线保持相对平坦.A kind of highly birefringent photonic crystal fiber based on AszSe3 is proposed. It is designed with rectangular array of six air holes in the core region and octagonal arranged cladding. Due to the high refrac- tive index of As2Se3, higher birefringence and higher negative chromatic dispersion could be achieved. The char- acteristics of birefringence, confinement loss and dispersion are investigated by using the finite element method. Numerical simulation results show that the birefringence at wavelength of 1.55 μm is up to 1.56× 10^-1 ,which indicates good capability of polarization. Simultaneously, the confinement loss of y-axis direction is as low as 6. 442 78×10^-9 dB/m. In the width of wavelength from 1.3 to 2.0 μm, the curve of dispersion is relatively flat.

关 键 词：光子晶体光纤 有限元法 微结构纤芯 高双折射 

分 类 号：O436[机械工程—光学工程]