Analysis of disturbance-induced "virtual" perturbations in chirped pulse φ-OTDR
Autores
Marcon, Leonardo; González Herráez, Miguel; Soriano Amat, Miguel; Veronese, Riccardo; García Ruiz, Andrés; [et al.]Identificadores
Enlace permanente (URI): http://hdl.handle.net/10017/41390DOI: 10.1109/LPT.2019.2963219
ISSN: 1041-1135
Fecha de publicación
2019-12-31Patrocinadores
European Commission
Ministerio de Economía y Competitividad
Agencia Estatal de Investigación
Comunidad de Madrid
Ministerio de Ciencia e Innovación
Cita bibliográfica
Marcon, L., Soriano-Amat, M., Veronese, R., García-Ruiz, A., Calabrese, M., Costa, L., Fernández-Ruiz, M.R., Martins, H.F., Palmieri, L. & González-Herráez, M. 2020, "Analysis of disturbance-induced ‘virtual’ perturbations in chirped pulse φ-OTDR", IEEE Photonics Technology Letters, vol. 32, no. 3, pp. 158-161.
Palabras clave
Distributed Acoustic Sensing
Phase-sensitive Optical Time Domain Reflectometry
Rayleigh scattering
Proyectos
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/CAM//S2018%2FNMT4326/ES/Sensores e INstrumentación en tecnologías FOTÓNicas2/SINFOTON2
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/MICINN//IJCI-2017-33856
Tipo de documento
info:eu-repo/semantics/article
Versión
info:eu-repo/semantics/acceptedVersion
Versión del editor
http://dx.doi.org/10.1109/LPT.2019.2963219Derechos
Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
© 2019 IEEE
Derechos de acceso
info:eu-repo/semantics/openAccess
Resumen
When a disturbance acts on a fiber it induces a change in the local refractive index that influences the fiber backscattering trace. If a chirped pulse φ-OTDR setup is used to interrogate the fiber, this refractive index change appears as a local shift of the received trace, linear to the acting perturbation. However, the refractive index change influences the round trip time of all the backscattering components generated by further fiber sections as well. Due to the high sensitivity of chirped pulse φ-OTDR, the change in the round trip time of the backscattering components, which is usually negligible, may appear as a virtual perturbation in certain conditions. In this letter we derive a mathematical model for the virtual perturbation induced by a disturbance acting on the fiber, when the measurement is performed by a chirped pulse φ-OTDR. We experimentally validate the model by inducing a temperatura change on a known span of fiber while monitoring its effects in a further fiber section kept at rest. The experimental results are then analyzed and compared with the theoretical ones.
Ficheros en el ítem
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