中文摘要：

运用傅立叶分析与均匀光纤光栅耦合模理论的结果，对取样光纤光栅的光谱特性进行了理论研究，得到取样光纤光栅反射峰包络、反射峰间隔和反射峰数量的理论计算公式．介绍了取样光纤光栅的实验写入方法，并且进行了实验写入，得到的结果与理论分析结果一致．

英文摘要：

According to Fourier analysis theory and the results of coupling theory of uniform fiber grating, the spectral characteristics of sampled fiber grating is studied theoretically and the formula about its overall envelop, peek interval and the number of these peaks are obtained. The imprinting methods of sampled fiber grating are demonstrated experimentally and the results are consistent with the theory.