METHOD FOR MONITORING OPTICAL FIBER LINE OF WDM-PON ACCESS NETWORK

摘要

Each other are multiplexed are n numbers of signal light having different wavelengths for transmitting and monitoring the presence of error in each distribution optical line in a passive optical network for wavelength division multiplexing method with n distributed optical line to be transmitted is a signal the demultiplexer through a main optical line this method is provided. The monitoring method of n each step of generating and multiplexing a monitor light with a different wavelength and, a step for demultiplexing to n individual monitor light having the other wavelength-multiplexed monitor light and branching by demultiplexing each and the step of transmitting the individual monitor light through the respective distribution optical line, on each distribution rays individual monitor light backscatter or reflected phase and is reflected on each distribution optical line multiplexed by a monitoring light for the transmitted individual monitor light analyzing step of multiplexing, the multiplexer and a monitor light and a step of determining the presence of error in each optical line distribution. In this method, individual monitor light and signal light to be transmitted through each optical line distribution are substantially identical to each other.