The supercell model for the Bragg fibers is proposed for investigating the mode characteristics and propagation properties.
为了研究布拉格光纤的模式特征和传输特性,提出了超格子模型,利用傅里叶级数表示光纤横向折射率分布,利用平面波展开法分析布拉格光纤的能带结构,基于厄米-主斯函数的局域正交函数展开法,从全矢量耦合波动方程出发,得到关于模式传播常量和电场展开系数的本征方程,从而分析布拉格光纤的模式特征。
A new method for constructing supercell lattice is proposed; with this method the transverse index profile is decomposed into two periodic structures, and the mode field is decomposed using Hermite-Gaussian functions.
发展了一种新型超格子的构造方法 ,将光子晶体光纤的横向介电常数表示为两种周期性结构叠加 ,这两种周期性结构分别用余弦函数展开 ;同时将横向电场以Hermite Gaussian函数展开 。
According to the equivalent definition of semilattice and hyperoperation, some new concepts——hypersemilattice, subhypersemilattice and the ideal of hypersemilattice are given.
在此基础上又给出了子超半格和超半格的理想的概念,并且研究了它们的同态象、乘积、交并关系及其等价刻画。
The concept of squeezing ratio is defined to study the influence of squeezing on the PCF′s birefringence characteristics by supercell lattice method.
定义了压缩率的概念,提出了一个可以构建三角格子、压缩三角格子、正方格子和矩形格子光子晶体光纤的模型;基于此压缩率模型,应用超格子构造法研究了压缩对光子晶体光纤双折射特性的影响。