Fiber identification without cut point using distributed fiber optic sensing

US12345554B2 · kind B2 · utility

Assignee

• NEC CORPORATION · JP

Inventors

• Ming-Fang Huang · Princeton, US
• Philip Nan Ji · Cranbury, US
• Shaobo HAN · Princeton, US
• Ting Wang · Plainsboro, US

Key dates

• Filing date: Nov 15, 2022
• Grant date: Jul 1, 2025
• Expiry date: Jan 19, 2044

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/4482
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Systems, methods, and structures for efficiently identifying individual fibers located in a deployed cable that advantageously reduces laborious field efforts while reducing service outage time. The systems and methods locate a targeted fiber in a cable (“Cable ID”) and then identify the targeted fiber (“Fiber ID”) by detecting DFOS signal attentions—without cutting the optical fiber. Two distinct determinations may be made namely, Cable ID and Fiber ID. DFOS operation detects vibration signals occurring along a sensor fiber. As implemented, Cable ID is an interactive-machine learning-based algorithm that automatically locates cable position along a sensor fiber route. Fiber ID detects a signal attenuation by bending a group of fibers with bifurcation to pinpoint a targeted individual fiber within a fiber cable.