C_(6v)对称六角与圆形空气柱TIR-PCF基模色散比较  

Comparison of the Fundamental Mode Dispersion Characteristics of Six-fold Rotation Symmetry TIR-PCF Cladding with Hexagonal and Circular Air Column

作　　者：汤炳书[1] 

机构地区：[1]连云港师范高等专科学校物理系,江苏连云港222006

出　　处：《光通信研究》2016年第3期40-42,共3页Study on Optical Communications

基　　金：江苏省教育厅高校"青蓝工程"中青年学术带头人培养对象资助项目

摘　　要：设计了一种由六角形空气柱包层组成的C_(6v)(六重旋转对称)全内反射型PCF(光子晶体光纤),采用全矢量有限元法研究其基模色散,数值研究结果表明,在其他参数不变的情况下,包层空气柱由圆形变成六角形后两基模偏振态会出现分离现象,存在较大的模式双折射与较高的PMD(偏振模色散),基模的波长色散在X偏振时与包层圆形空气柱时有相同的变化曲线,说明包层空气柱形状对基模色散特性有较大影响。A C6v TIR-PCF (the six-fold rotation symmetry total internal reflection photonic crystal fiber)of cladding with hexa-gonal air column is designed in this paper.The fundamental mode dispersion characteristics are investigated numerically by full vector finite element method.The numerical results show that when other parameters are unchanged,original two fundamental mode polarization are separated if the shape of the cladding air column changes from circular to hexagonal.We can also observe a large mode birefringence and high degree of polarization mode dispersion.The results also show that the wavelength disper-sion of the fundamental mode in X polarization have the same variation curve with cladding circular air column.It means that the fundamental mode dispersion characteristic has a great influence on the shape of cladding air column.

关 键 词：六重旋转对称全内反射型光子晶体光纤 全矢量有限元法 基模色散 

分 类 号：TN818[电子电信—信息与通信工程]