Detection pulse waveform self-tuning system and method based on PON link fault identification

Abstract

The invention discloses a detection pulse waveform self-tuning system and method based on PON link fault identification. The system comprises a light source module, a light source driving module, a circulator, a two-dimensional encoding module, a light receiving module, a data acquisition card and a PC. In terms of method, the invention, based on software controlled retrieval waveform, finds the retrieval waveform with the largest difference from the reference signal in the case of open circuit as the optimal waveform, thereby reducing the false judgment rate and adapting to the environmentalchange of the optical fiber link.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and in particular relates to a detection pulse waveform self-adjustment system and method based on PON link fault identification. Background technique [0002] With the sharp increase of people's demand for high-speed network, Passive Optical Network (PON) has become the most mainstream broadband access method due to its unique networking and broadband advantages. With the rapid growth of the number of network users and the continuous expansion of the scale of optical fiber links, the problems of management and fault detection of optical network links have become increasingly prominent. Most of the current detection systems are built with high-precision OTDR to achieve preventive detection, but this system is expensive and cannot be monitored dynamically in real time. [0003] In order to solve the problem of passive optical network fiber link fault monitoring, the PON link f...

AI Technical Summary

Problems solved by technology

However, in this technology at present, only a fixed light source is used to generate a search pulse of a single waveform for detection.

[0004] Since the reflected monitoring pulse is related to the waveform of the retrieval pulse, the threshold algorithm is unstable due to factors such as signal broadening for retrieval pulses of different waveforms, especially in the case of equidistant links or links with similar distances, which may easily lead to system misjudgment. Therefore, it is difficult for a single light wave to adapt to the actual environment of a widely distributed optical network, and it cannot achieve good results for the user status discrimination problem.

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