Intelligent Identification and Fault Location of Optical Cable Network Based on Fiber Encoding Technology

At present, the fault location of optical cable network is usually based on the signal of optical time domain reflectometry(OTDR)to detect the distance and attenuation of the fault point, but the OTDR equipment itself has a detection blind area, which leads to the inability to accurately locate the fault location. In this paper, based on the working principle of optical fiber coding technology, when the optical cable network is running normally, the reflection spectrum of optical fiber coding can be received in real time. Once the reflection spectrum can not be received, it can prove that the optical device is faulty, so as to realize the location of the fault point and complete the accurate positioning of the optical cable fault, and the geographical positioning error of the optical cable fault can be controlled within ±25 meters.