近零超平坦色散光子晶体光纤的数值分析  

Numerical Analysis of Ultra-flatten and Near-zero Dispersion for Photonic Crystal Fibers

作　　者：邱俊才[1] 刘汉奎[1] 田小兴[1] 袁福来[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：《半导体光电》2008年第3期407-410,共4页Semiconductor Optoelectronics

基　　金：四川省教育厅重点实验室专项项目(2006ZD026)

摘　　要：利用全矢量有限元法对六重对称的折射率导引型光子晶体光纤的色散特性进行了数值分析。通过优化纤芯折射率、空气孔直径、孔间距得到了良好的近零、超平坦色散特性。数值仿真结果表明在其它参量相同的情况下，纤芯折射率的变化对光子晶体光纤的色散系数有着明显的影响，它决定着色散的平坦程度和所在的波长范围。在优化参量配置的情况下，得到了在常规光通信波长范围内具有近零（-0．4～0.15ps／（km·nm））、超平坦色散特性的光子晶体光纤结构。The chromatic dispersion of a typical index-guiding photonic crystal fiber （PCF） with sixfold rotational symmetry was simulated by using full-vector finite element method （FV-FEM）. Through optimizing of the core index, air-hole diameter and the pitch, ultra-flatten and/or near-zero dispersion of the PCF was obtained. The numerical results indicate the core material index affects significantly the chromatic dispersion when the other parameters keep constant, and determines the dispersion flatness and the wavelength range in which good flatness appear. Finally, using a few sets of optimal parameters including the core index and the geometrical structure parameter, a near-zero dispersion （-0.4-0. 15 ps/（km·nm）） and/or ultra-flatten dispersion of the PCF is achieved for the light wavelengths in the traditional optical communication.

关 键 词：光子晶体光纤 超平坦色散 近零色散 有限元法 

分 类 号：TN253[电子电信—物理电子学]