Passive fiber network monitoring system and method

Abstract

The invention relates to a passive fiber network monitoring system and a method. A broadband optical time domain reflection module emits a plurality of light monitoring signals with different wavelengths, then a light wavelength selection module is used to select at least one light monitoring signal, and a filter arranged between an optical splitter and an optical network unit is used to filter the light monitoring signals with required wavelengths so as to monitor fibers between the optical network unit and the optical splitter. Therefore, the system and the method can solve the problem that the actual broken wire positions of the fibers cannot be quickly known through a monitoring result when the fibers at more than two clients are broken simultaneously in the known monitoring system, and further achieve the effect of quickly and accurately providing the broken wire positions of the fibers for a related maintenance person.

Description

technical field [0001] The invention relates to an optical fiber network monitoring system and method, in particular to a passive optical fiber network monitoring system and method. Background technique [0002] At present, the passive optical fiber network is undoubtedly the most popular technology in the optical access network, but there is still no breakthrough in the monitoring technology of optical fiber quality. [0003] Figure 1A Shown is a known block diagram of monitoring a passive optical fiber network with an optical time domain reflectometer. Please refer to Figure 1A The optical time domain reflectometer 110 and the optical path terminal 103 are respectively coupled to the optical splitter 102, and the optical monitoring signals sent by it are respectively transmitted to each optical network unit (that is, the client) ONU through the optical splitter 102 -1, ONU-2, ..., ONU-n. Afterwards, these optical monitoring signals will be reflected back to the optical...

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Problems solved by technology

[0004] However, when more than two clients experience fiber disconnection, although it can be seen from the reflected waveform R2 received by the optical time domain reflectometer 110 that there are several clients in which the fiber disconnection occurs, as Figure 1C shown, but it is impossible to determine the actual location of the fiber break

[0005] It can be seen from the above that the monitoring results obtained by using the known passive optical fiber network monitoring technology cannot enable the relevant personnel to accurately identify the location of each optical fiber disconnection when there are more than two optical fiber disconnections at the client. It is necessary to propose improved technical means to solve this problem

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