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dc.contributor.authorLu, Xin
dc.contributor.authorThomas, Peter James
dc.date.accessioned2023-11-02T07:14:59Z
dc.date.available2023-11-02T07:14:59Z
dc.date.created2023-06-09T12:36:18Z
dc.date.issued2023
dc.identifier.citationPhotonics. 2023, 10 (5), .en_US
dc.identifier.issn2304-6732
dc.identifier.urihttps://hdl.handle.net/11250/3100149
dc.description.abstractPhase-sensitive optical time-domain reflectometry (φOTDR) is a technology for distributed vibration sensing, where vibration amplitudes are determined by recovering the phase of the backscattered light. Measurement noise induces phase errors, which degrades sensing performance. The phase errors, using a differentiation and cross-multiplication (DCM) algorithm, are investigated theoretically and experimentally in a φOTDR system based on a phase retrieval configuration consisting of an imbalanced Mach–Zehnder interferometer (IMZI) and a 3 × 3 coupler. Analysis shows that phase error is highly dependent on the AC component of the obtained signal, essentially being inversely proportional to the product of the power of the light backscattered from two locations. An analytical expression was derived to estimate the phase error and was confirmed by experiment. When applied to the same measurement data, the error is found to be slightly smaller than that obtained using in-phase/quadrature (I/Q) demodulation. The error, however, increases for longer measurement times.en_US
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjectFiber optiske sensoreren_US
dc.subjectFiber optical sensorsen_US
dc.titlePhase Error Evaluation via Differentiation and Cross-Multiplication Demodulation in Phase-Sensitive Optical Time-Domain Reflectometryen_US
dc.title.alternativePhase Error Evaluation via Differentiation and Cross-Multiplication Demodulation in Phase-Sensitive Optical Time-Domain Reflectometryen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.subject.nsiVDP::Teknologi: 500en_US
dc.subject.nsiVDP::Technology: 500en_US
dc.source.volume10en_US
dc.source.journalPhotonicsen_US
dc.source.issue5en_US
dc.identifier.doi10.3390/photonics10050514
dc.identifier.cristin2153314
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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