Effect of strong local stretching of sensing fibre on the operation of a phase-sensitive optical time-domain reflectometer. (February 2021)

• Record Type: Journal Article
• Authors: Bengalskii, D.M.; Kharasov, D.R.; Fomiryakov, E.A.; Nikitin, S.P.; Nanii, O.E.; Treshchikov, V.N.
• Is Part Of: Quantum electronics. Volume 51:Number 2(2021)
• Page Start: 175
• Page End: 183
• Publication Date: 2021-02
• Subjects: fibre-optic sensor -- distributed sensor -- phase-sensitive optical reflectometer -- piezoelectric effect -- piezoelectric fibre modulator -- strong impact on fibre -- frequency modulation -- correlation; Quantum electronics -- Periodicals; 537.5
• DOI: 10.1070/QEL17369
• Languages: English
• ISSNs: 1063-7818

Abstract

Abstract: It has been shown experimentally and confirmed by numerical simulation that strong local stretching of sensing fibre distorts the signal detected by a phase-sensitive optical time-domain reflectometer (OTDR) from the fibre section behind the local disturbance region. Comparison of experimental data with theoretical estimates and numerical simulation results leads us to conclude that the physical mechanism underlying the distortion of the OTDR trace is related to the external disturbance-induced variable shift of the optical carrier frequency of probe pulses.