将取样光纤光栅近似为引入多个有规律的大尺寸缺陷的一维二元光子晶体,运用光子晶体传输矩阵理论分析了其长度L、周期LA、折射率调制量δneff和采样率p等参量对其反射谱的影响规律,并将所得结果与用取样光纤光栅传输矩阵法计算所得结果进行了比较,得出了用光子晶体理论分析与用传统的模耦合理论分析相吻合的特性。在分析取样光纤光栅的其它性质以及将其应用于实际时都可借鉴此理论,以达到工程实际应用的最佳效果。 The sampled fiber Bragg grating is approximated as a one-dimensional binary photonic crystal with many regular and large defects. The parameters of length L, period LA, refractive index modulation δneff and sampling rate p are analyzed using photonic crystal transfer matrix theory The results are compared with the results obtained by the sampling fiber grating transmission matrix method. The results of photonic crystal theory analysis and traditional mode coupling theory analysis are obtained. In the analysis of the other properties of sampling fiber grating and its practical application, we can learn from this theory in order to achieve the best effect of practical engineering.