Characterization and modelling of induced "virtual" perturbations in chirped pulse φ-OTDR

Authors
Soriano Amat, MiguelUniversity of Alcalá Author; Marcon, Leonardo; Pereira da Costa, Luis DuarteUniversity of Alcalá Author; García Ruiz, AndrésUniversity of Alcalá Author; Fidalgo Martins, HugoUniversity of Alcalá Author; [et al.]
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/39686
DOI: 10.1117/12.2540760
ISSN: 0277-786X
Publisher
SPIE
Date
2019-10-01
Affiliation
Universidad de Alcalá. Departamento de Electrónica
Funders
European Commission
Ministerio de Economía y Competitividad
Agencia Estatal de Investigación
Comunidad de Madrid
Bibliographic citation
Soriano-Amat, M., Marcon, L., Costa, L., García-Ruiz, A., Martins, H. F., Martín-López, S., Palmieri, L. & González-Herráez, M. 2019, "Characterization and modelling of induced virtual perturbations in chirped pulse φOTDR”, Proceedings of SPIE, vol. 11199, 7th European Workshop on Optical Fibre Sensors, 111992A
Keywords
Phase-sensitive OTDR
Rayleigh scattering
Distributed Acoustic Sensing
Description / Notes
7th European Workshop on Optical Fibre Sensors (EWOFS'2019), 01/10/2019-04/10/2019, Limassol, Chipre.
Project
info:eu-repo/grantAgreement/EC/H2020/722509/EU/Fibre Nervous Sensing Systems/FINESSE
info:eu-repo/grantAgreement/EC/H2020/WaterJPI-JC-2015-04/EU/Dikes and Debris Flows Monitoring by Novel Optical Fiber Sensors/DOMINO
info:eu-repo/grantAgreement/MINECO//TEC2015-71127-C2-2-R/ES/REDUCCION DE LOS EFECTOS DE RUIDO EN SISTEMAS DE FIBRA OPTICA NO LINEALES/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-097957-B-C31/ES/INGENIERIA DE SEÑALES OPTICAS COMPLEJAS PARA SISTEMAS DE FIBRA OPTICA MAS ALLA DE LA TELECOMUNICACION/
info:eu-repo/grantAgreement/Comunidad de Madrid//S2018%2FNMT4326/ES/Sensores e INstrumentación en tecnologías FOTÓNicas2/SINFOTON2
info:eu-repo/grantAgreement/AEI//IJCI-2017-33856
Document type
info:eu-repo/semantics/conferenceObject
Version
info:eu-repo/semantics/acceptedVersion
Rights
Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
© 2019 SPIE
Access rights
info:eu-repo/semantics/openAccess
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Abstract
Any temperature change or strain acting on a section of the fiber induces a local variation of the refractive index. If the fiber is monitored by a chirped pulse φ-OTDR system, the variation of the refractive index causes a local shift of the backscattering trace and produces a change in the round trip time of the light coming from any further position of the fiber. While usually negligible, due to the high sensitivity of the chirped pulse φ-OTDR, in extreme occasions the distributed round trip time change may appear in the measurement as an undesired “virtual” perturbation. In this paper, we discuss and experimentally validate a mathematical model to account for (and eventually correct) the “virtual” perturbation.
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