应用耦合模理论和传输矩阵法计算模拟了长周期光纤光栅的透射谱，并对其进行了切趾优化。

Based on the coupled-mode theory, the transfer-matrix method is used to calculate the transmission spectra of phase-shifted long-period fiber gratings (LPFG).

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用传输矩阵法对取样光栅的反射谱特性进行数值模拟分析，得到光栅各参数的变化对取样光栅反射谱特性的影响规律。

Using transfer matrix method we make numerical analyses for the reflective spectrum of sampled grating and get the rules how grating's parameters influence the reflective spectrum.

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用传输矩阵法对取样光栅的反射谱特性进行数值模拟分析，得到光栅各参数的变化对取样光栅反射谱特性的影响规律。

Using transfer matrix method we make numerical analyses for the reflective spectrum of sampled grating and get the rules how grating's parameters influence the reflective spectrum.

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