Intelligent Passive Optical Access Network with Fire Alarming Services

A novel passive optical access network with fire alarming services is proposed in this paper. The architecture uses the fiber Bragg gratings (FBGs) with the same central wavelength and low reflectivity as sensors. Sensing signals are integrated into the Ethernet psssive optical network (EPON) system without changing its architecture. In addition, the optical time domain reflectometer (OTDR) technology us used to position. This architecture has almost no impact on the power and the distortion of the optical communication signals. By using FBGs with the same central wavelength, complex and expensive FBG's wavelength demodulation technology is not necessary.