利用改进的非对称六层波导模型，分析了光纤布拉格反射滤波器的特性，讨论了波导结构参数主要是高折射率层的厚度对器件特性的影响，指出了在制作过程中控制器件反射率的途径。实验上在１．５５μｍ波段制作出了反射率达９６％、带宽１．５ｎｍ的器件 The improved asymmetric six-layer waveguide model is used to analyze the characteristics of the fiber Bragg reflection filter. The influence of the thickness of the high refractive index layer on the device characteristics is discussed. The influence of the device reflectivity way. Experiments in the 1.55μm band produced a reflectivity of 96%, bandwidth 1.5nm devices