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

An optical fiber link and optical signal technology, applied in electromagnetic wave transmission systems, electrical components, transmission systems, etc., can solve problems such as faults, distinguish optical signal faults, etc., to reduce the incidence of faults, monitor spectral conditions in real time, and reduce losses. Effect

Active Publication Date: 2013-02-13
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 s...

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

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0041] Such as figure 2 As shown, the device for detecting optical signal performance and diagnosing fiber link faults according to the present invention includes: 2×2 optical couplers, 2×1 optical switches, C+L / S band filters, OPM modules and OTDR module,

[0042] 2×2 optical coupling is used to connect OLT and ODN network, including the first port P01, the second port P02, the third port P03 and the fourth port P04, the downlink direction is from the first port PO1 to the second port P02 and the fourth port Port P04, the uplink direction is from the second port P02 to the first port P01 and the third port P03, the branch ratio is determined according to the application;

[0043] In order to ensure the quality of the monitoring signal and the accuracy of fault diagnosis, the ratio of P01 and P03 of the 2×2 coupler is 90:10, and the ratio of P02 and P04 is...

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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...

Claims

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Application Information

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IPC IPC(8): H04B10/071H04B10/075
Inventor 王素椅何岩
Owner FENGHUO COMM SCI & TECH CO LTD
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