The rise in users on the Passive Optical Network (PON) has made the architecture of this network increasingly complex with a growing point-to-multi-point (P2MP) network. Thus, network monitoring has become more crucial and should be carried out in order to monitor the transmission of signals to each optical network unit (ONU) and prolonged service can be provided to the users without problems. A monitoring signal using limited bandwidth has been combined with data signals at the optical line terminal (OLT) at the central office to monitor the status of each ONU in the network. This signal has been transmitted along the fiber and will be used to reflect the spectrum of uniform fiber Bragg grating (FBG) located before the ONU. FBG binary codes will be used as an indicator between one ONU to another ONUs by varying the wavelength used by the FBGs in the network to represent each ONU. This paper presents two techniques to monitor network health by creating FBG configuration design (FBG codes) to identify fault branches as well as simulation results and performance parameters will be analysed and compared to obtain the best techniques by considering several aspects such as economical and technical.

随着无源光网络 (PON) 用户的增加，随着点对多点 (P2MP) 网络的发展，该网络的架构变得越来越复杂。因此，网络监控变得更加重要并且应该被执行以监控到每个光网络单元（ONU）的信号传输并且可以毫无问题地向用户提供延长的服务。使用有限带宽的监控信号与中心局光线路终端（OLT）的数据信号相结合，以监控网络中每个ONU的状态。该信号已沿光纤传输，将用于反射位于 ONU 之前的均匀光纤布拉格光栅 (FBG) 的频谱。通过改变网络中 FBG 使用的波长来表示每个 ONU，FBG 二进制代码将用作一个 ONU 与另一个 ONU 之间的指示符。本文介绍了两种通过创建 FBG 配置设计（FBG 代码）来识别故障分支来监控网络健康状况的技术，并将分析和比较仿真结果和性能参数，通过考虑经济和技术等几个方面来获得最佳技术。