Method for Monitoring Optical Fiber Line of WDM-PON Access Network

摘要

In the passive optical optical network of wavelength division multiplexing system, where n signal beams having different wavelengths are combined and transmitted through one trunk beam and the signal beam is split and transmitted, the presence or absence of abnormality in each distribution beam is monitored. A method is provided. The monitoring method comprises the steps of generating and combining the supervisory light having n different wavelengths, demultiplexing the supervised supervisory light into n individual supervisory light having different wavelengths, and each branched by demultiplexing. Transmitting the individual monitoring beams through the respective distribution beams, backscattering or reflecting the individual monitoring beams on each of the distribution beams, and combining the individual monitoring beams backscattered and transmitted from the respective distribution beams to monitor one. Multiplexing the light, and analyzing the combined surveillance light to determine whether there is an abnormality in each of the split light paths. In this method, the individual monitoring light and the signal light transmitted through each distribution beam have different wavelengths.;Wavelength Division Multiplexing, Beam Monitoring, Backscattered Light Meters, OTDR