利用现有的光纤通信网实现对光纤光栅传感网络的远程监控,既可以避免重新铺设传感信道,节约成本,又可以增加传感网组网的灵活性。提出了一种基于阵列波导光栅(AWG)的面向光接入网的光纤布拉格光栅(FBG)传感网传感数据数字化系统,系统能够快速实现对携带传感信息的FBG反射波长的数字化。分析了系统的工作原理及主要误差来源,并设计了传感数据成帧模块的结构及适于在光接入网中传输的传感数据帧结构。采用OptiSystem/Matlab协同仿真的方法对一个3×3光纤光栅传感网络进行了仿真实验,实现了在-50℃～100℃范围内精度为1℃的温度监测,能够满足日常温度监控需要。实验结果表明了该方案的可行性。 By using the existing optical fiber communication network to realize the remote monitoring of the FBG sensing network, it can avoid re-laying the sensing channel, save the cost, and increase the flexibility of the sensor network. A digital fiber grating sensing system (Bragg grating FBG) sensor network based on Arrayed Waveguide Grating (AWG) is proposed. The system can digitize FBG reflection wavelength with sensing information quickly. The working principle of the system and the main sources of error are analyzed. The structure of the sensing data framing module and the sensing data frame structure suitable for transmitting in the optical access network are also designed. A 3 × 3 FBG sensor network was simulated by OptiSystem / Matlab co-simulation method, which realized the temperature monitoring with the accuracy of 1 ℃ within the range of -50 ℃ ~ 100 ℃, which can meet the needs of daily temperature monitoring. The experimental results show the feasibility of the scheme.