Resolve dispersion equation and obtain the effective refractive index of cladding using method of numerical calculation.
推导出纤芯、包层、薄膜层、环境层的场分布表达式，利用数值计算求出了包层膜的有效折射率。
With this model, the effective index of PCF cladding with different structure parameters was discussed.
应用此模型对不同结构光子晶体光纤包层区的等效折射率与波长的关系进行了讨论。
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