Simplified method for passive optical network in-service fibre-fault monitoring based on fibre Bragg gratings

摘要

The fibre-fault monitoring is a crucial network element, especially for passive optical networks. In this work is presented and demonstrated experimentally a simplified method for the optical access network monitoring, based on fibre Bragg gratings, deployed near vulnerable network locations. We experimentally demonstrated the use of this technique in a four-branch PON with a maximum span of 60 km, with the FBG monitors placed in several positions along the network. From the experimental results, the proposed method applicability is set for up to 90-km-long networks. Since this method does not require active optical devices, it could be applied in extended reach networks, with reduced implementation costs, which is an advantage to other monitoring methods.