Optical fiber fault detection system

Abstract

The embodiment of the invention relates to the technical field of optical communication, and discloses an optical fiber fault detection system which comprises a first optical combining unit and a first eOTDR, wherein the first optical combining unit is arranged between two pieces of optical transmission network equipment, and an optical fiber between the two pieces of optical transmission networkequipment penetrates through the first optical combining unit; the first eOTDR is connected with the first optical combining unit and used for emitting first eOTDR detection light to the first opticalcombining unit, and the wavelength of the first eOTDR detection light is different from that of the service light; the first light combining unit is used for adding the first eOTDR detection light into the optical fiber for transmission, receiving reflected light reflected by the first eOTDR detection light after the first eOTDR detection light is transmitted by the optical fiber, and transmitting the emitted light to the first eOTDR; the first eOTDR is also used for determining whether the optical fiber has a fault or not according to the reflected light of the first eOTDR detection light. The optical fiber fault detection system provided by the embodiment of the invention can perform online real-time detection on the optical fiber performance, and realizes automatic positioning of the optical fiber fault.

Description

technical field [0001] The embodiments of the present application relate to the technical field of optical communication, and in particular to an optical fiber fault detection system. Background technique [0002] At present, optical fiber is the foundation of optical communication transmission network, and the performance of optical fiber core directly affects the performance of transmission network. Considering the faults of the transmission network, the faults caused by fiber breakage and fiber quality degradation account for more than 65% of the total. Fiber faults occur frequently, but it is difficult to detect them in advance and deal with them in a timely manner. The current method for locating fiber optic faults is that maintenance personnel carry an optical time domain reflectometer (Optical Time Domain Reflectometer, OTDR) to the site for testing after receiving a failure report from the network management. [0003] In the prior art, the Chinese patent with the pu...

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Problems solved by technology

[0005] 1. In case of faults such as fiber breakage, abnormal fiber attenuation, and abnormal connectors, the network management needs to notify the optical fiber maintenance department to send personnel to the station for testing, which takes a long time to locate the fault and is inefficient;

[0006] 2. OTDR instrument test will cause business interruption, does not support business non-destructive test, does not support online, real-time, automatic fiber inspection;

[0007] 3. For daily operation and maintenance, it is impossible to know the fiber performance and parameter changes in advance, and prevent failures in advance, and the OTDR instrument is expensive and the measurement cost is high

[0008] Therefore, the current OTDR instrument cannot monitor the optical fiber performance and parameter changes in advance, and the optical fiber performance cannot be intelligently managed by the network management system, and cannot realize online, real-time, and automatic inspection of the optical fiber. Waiting for failure can not be warned in advance

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