用传输矩阵法从理论上计算了取样光纤布拉格光栅的反射（传输）谱特性，提出了几种提高其谱特性的调制方案。用取样掩模版一次成栅的方法首次获得了波长间隔为０．８ｎｍ和１．６ｎｍ的取样光纤布拉格光栅 The transmission matrix method is used to calculate the reflection (transmission) spectrum characteristics of sampled fiber Bragg gratings. Several modulation schemes are proposed to improve their spectral characteristics. The sampling reticle with a wavelength of 0.8nm and 1.6nm was obtained for the first time by sampling the reticle into a grating.