Measurement of polarization fading sensitivity in FBGs-assisted Phase-OTDR

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AuteurSANDAH, BENI FOURIER
AuteurDOSSOU, MICHEL
AuteurWUILPART, MARC
Date d'ajout2026-06-02T16:06:57Z
Date de disponibilite2026-06-02T16:06:57Z
Date de publication2023
ResumeDistributed optical fiber vibration sensors (DOFSs) such as those based on phase-sensitive optical time-domain reflectometry (φ-OTDR) have contributed to improve structural health monitoring (SHM). φ-OTDR allows distributed vibration sensing by analysing the interference properties of the backscattered/reflected signal when an optical pulse is launched into the sensing fiber. As the Rayleigh backscattered light is relatively weak, fiber Bragg grating (FBG) arrays can be inscribed in the sensing fiber to increase the signal-to-noise ratio. However, the interference of the signals reflected by two consecutive FBGs (containing information about the locally applied vibration) is subject to a polarization fading effect as the sensing fiber presents some birefringence. Therefore the states of polarization (SOP) of the interfering reflected signals are no longer fully aligned. The present work proposes a measurement setup to quantify the polarization effects in a direct detection phase-OTDR scheme through the polarization fading sensitivity (PFS) parameter.
DOI10.1117/12.2677355
Autre identifiantBECDB-16891
URIhttps://dspace.uac.bj/handle/123456789/14120
Languefr
Fait partie deSPIE - The International Society for Optical Engineering
SujetDFOS
SujetFBGs
Sujetφ-OTDR
Sujetvibration sensing
Sujetpolarization effects
TitreMeasurement of polarization fading sensitivity in FBGs-assisted Phase-OTDR
TypeArticle

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