Extending the operation range of a phase-sensitive optical time-domain reflectometer by using fibre with chirped Bragg gratings
Д.Р. Харасов, D.M. Bengalskii, M. Y. Vyatkin, О. Е. Наний, E.A. Fomiryakov, Sergei Nikitin, S.M. Popov, Yu. K. Chamorovsky, В Н Трещиков
Abstract
Abstract >A record long external-disturbance detection distance of 140 km without employing optical amplifiers in the fibre line is demonstrated by a phase-sensitive optical time-domain reflectometer (Φ-OTDR) using a fibre section with inscribed chirped fibre Bragg gratings (CFBGs). This solution provides simultaneous operation of Φ-OTDR with a standard single-mode fibre at a distance of up to 100 km and with a CFBG fibre section located from the fibre line input point by at least 140 km.
Topics & Concepts
Optical time-domain reflectometerOpticsMaterials scienceFiber Bragg gratingOptical fiberPhase (matter)AmplifierTime domainFiber optic sensorOptoelectronicsPolarization-maintaining optical fiberPhysicsComputer visionQuantum mechanicsCMOSComputer scienceAdvanced Fiber Optic SensorsOptical Network TechnologiesAdvanced Photonic Communication Systems