This paper describes the application of finite element method for obtaining the TE mode′s cutoff wavelength and the field pattern of symmetric quadruple-ridged rectangle waveguide.

应用有限元分析方法计算了对称四脊矩形波导TE模式的传输特性，即截止波长和场结构图传输特性。

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The normalized propagation constant, which determines the number of the modes and mode cutoff is obtained for a PCF: with a certain structure parameters.

对于给定结构的PCF，计算得到了决定模式数量及模式截止的归一化传播常数。

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For example, for a homogeneous optical fiber the computed relative error of normalized cutoff frequency for all guide-mode are between 10 ~ (-3) and 10 ~ (-5).

例如，对均匀光纤，计算出的所有导模的归一化截止频率值的相对误差为10 ~ (- 3)10 ~ (- 5)。

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