光子晶体光纤非线性系数的数值分析  

Numeric Analysis of Nonlinear Coefficient of Photonic Crystal Fibers

作　　者：邱俊才[1] 刘汉奎[1] 田小兴[1] 

机构地区：[1]西华师范大学物理与电子信息学院,四川南充637002

出　　处：《西华师范大学学报（自然科学版）》2007年第4期286-289,共4页Journal of China West Normal University(Natural Sciences)

基　　金：四川省教育厅重点实验室专项基金资助项目(2006ZD026)

摘　　要：利用全矢量有限元法对六重对称的全内反射型光子晶体光纤的非线性系数进行了数值分析.模拟了光子晶体光纤的非线性系数与纤芯材料折射率、空气孔直径、孔间距的关系,结果表明在其它参量相同的情况下,纤芯材料折射率的变化对光子晶体光纤的非线性系数有着明显的影响,尤其是在输入光波长小于1.0μm范围内.在波长为0.5μm处,当纤芯材料折射率为1.45时非线性系数为0.404 7m-1W-1,但纤芯材料折射率为1.40时非线性系数高达1.792m-1W-1.By using full-vector finite element method （FV-FEM） , the nonlinear coefficient of a typical total internal reflection （TLR） photonic crystal fiber with sixfold rotational symmetry is simulated numerically. The dependence of nonlinear coefficient on the core material index, the air hole diameter and the pitch are shown. The simulation results indicate that the core material index will significantly affect the nonlinear coefficient, especially when the light wavelength is less than 1.0μm. When light wavelength is 0.5μm, the nonlinear coefficient can reach 0. 4047 m^-1W^-1 and 1. 792m^-1W^-1 respectively for the core material index chosen as 1.45 and 1.40.

关 键 词：光子晶体光纤 非线性系数 有限元法 纤芯材料折射率 

分 类 号：TN929.11[电子电信—通信与信息系统]