Abstract: Many efficient monitoring methods were proposed and applicability was demonstrated. One of the proposed methods uses passive components at the subscriber side (a simple FBG) for reflects the monitoring signal that generated in the OLT. The OLT apply simple signal processing steps on the OFDR trace to deduce the Bragg wavelength shift of each FBG in the network. Then calculate the shifting amount that give us the temperature at any place in the network. This functionality provides the monitoring system with the capability of foreseeing the evolution of temperature in the network terminals before some unexpected environmental conditions (high temperature, freezing due to an open remote terminal port. This system can be used in our TWDM-PON to monitor the ODN&ONU efficiently. In this thesis, a study for a Comparison between AWG methods with wide band source and FBG methods with two frequency source.
Oleg G. Morozov and Mustafa H. Ali, 2016. Monitoring of FBG as Elements of Subscriber Access Nodes in TWDM-PON. Research Journal of Applied Sciences, 11: 776-783.