However, the numerical analysis of coupled-mode equation with self-coupling coefficient is demanded for the insight of the spectral of LPFG coupler.

但当侧重频谱的具体特性时，则必须采用考虑自耦合系数的耦合方程组的数值解进行优化设计。

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However, the numerical analysis of coupled-mode equation with self-coupling coefficient is demanded for the insight of the spectral of LPFG coupler.

但当侧重频谱的具体特性时，则必须采用考虑自耦合系数的耦合方程组的数值解进行优化设计。

youdao