Method and device for detecting optical signal performance and diagnosing fiber link fault

Abstract

The invention relates to a method and a device for detecting optical signal performance and diagnosing a fiber link fault. A combined signal of an uplink wavelength and a downlink wavelength passes through a monitoring device. The device comprises a photo-coupler, a photo-switch, a C+L / S waveband filter, an OPM module and an OTDR (optical time domain reflectometer) module; a second port P02 of the photo-coupler is connected with ODN; a fourth port P04 is connected with a branch end P2 of the photo-switch; a first port P01 is connected with OLT; a third port P03 is connected with the branch end P1 of the photo-switch; a selector P2 monitors the performance of the device to an uplink optical link and a downlink optical signal of the OLT part; and the selector P1 monitors the performance of the device to a fiber link and an uplink optical signal of the front end of ONU. The device is used for a WDM PON (wavelength division multiplexing PON) network, can detect the performance quality of the optical single, can provide a fault diagnosis function to the fiber link, can gradually eliminate a local fault or a remote fault, and a fiber link fault or an optical signal degradation fault, finally determines the type or position of the fault, and is an efficient and rapid signal detection and fault diagnosis approach.

Description

technical field [0001] The invention relates to the field of passive optical network optical access technology, especially the field of point-to-point WDM PON access technology, and specifically relates to a method and device for detecting optical signal performance and diagnosing fiber link failures. Background technique [0002] Wavelength Division Multiplexing Passive Optical Network (WDM PON:Wavelength Division Multiplexing PON) is a passive optical network using wavelength division multiplexing access technology. It has the advantages of exclusive bandwidth for each user, point-to-point leased line transmission in the form of wavelength division, mutual isolation between services or mutual isolation between users without affecting each other, etc., and has the advantage of point-to-multipoint in the application form. The direction of a generation of optical access technology. [0003] Due to the exclusive bandwidth of WDM PON, it can provide high bandwidth and good pri...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects existing in the prior art, the object of the present invention is to provide a method and device for detecting optical signal performance and diagnosing optical fiber link faults, so as to solve the problem of distinguishing between optical signal faults and optical fiber link faults in WDM PON networks, both It can detect the performance quality of optical signals and provide fiber link fault diagnosis function

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