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).
利用传输矩阵法，得到传输矩阵元的递推关系式及透射率。
By means of transfer matrix, we get the recursion relations of the transfer matrix elements and transmittance.
应用传输矩阵法计算了相位位移光纤光栅的透射特性，表明相位位移光纤光栅用于光开关可降低光功率的要求。
The transmittivity of phase-shifted FBG is computed using the method of transfer matrix. The result shows the availability of decreasing the power of pump by using the phase-shifted FBG.
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