Time-expanded phase-sensitive optical time-domain reflectometry
Authors
Soriano Amat, Miguel; Fidalgo Martins, Hugo; Durán, Vicente; Pereira da Costa, Luis Duarte; Martín López, Sonia; [et al.]Identifiers
Permanent link (URI): http://hdl.handle.net/10017/59867DOI: 10.1038/s41377-021-00490-0
ISSN: 2095-5545
Publisher
Springer Nature
Date
2021-03-09Funders
Comunidad de Madrid
Generalitat Valenciana
European Commission
Agencia Estatal de Investigación
Universitat Jaume I
Ministerio de Ciencia e Innovación
Bibliographic citation
Miguel Soriano-Amat, Hugo F. Martins, Vicente Durán, Luis Costa, Sonia Martin-Lopez,
Miguel Gonzalez-Herraez and María R. Fernández-Ruiz, Time-expanded phase-sensitive optical time-domain reflectometry, Light: Science & Applications, 2021, v. 10, n. 51.
Project
info:eu-repo/grantAgreement/CAM//S2018%2FNMT4326/ES/SENSORES E INSTRUMENTACION EN TECNOLOGIAS FOTONICAS2/SINFOTON2
info:eu-repo/grantAgreement/GVA//PROMETEO%2F2020%2F029
info:eu-repo/grantAgreement/EC/H2020/875302/EU/OCEAN-BOTTOM DISTRIBUTED ACOUSTIC SENSORS: NEW TOOLS FOR UNDERWATER SEISMOLOGY/OCEAN-DAS
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/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-097957-B-C32/ES/INGENIERIA DE PEINES DE FRECUENCIA DE BAJO COSTE PARA APLICACIONES DE SENSADO DISTRIBUIDO, ESPECTROSCOPIA Y METROLOGIA/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-097957-B-C33/ES/TECNICAS AVANZADAS DE GENERACION, AMPLIFICACION Y MEDIDA DE SEÑALES OPTICAS COMPLEJAS EN FIBRA OPTICA/
info:eu-repo/grantAgreement/UJI//UJI-B2019-45/ES/Fiber-optic distributed sensing using ultra-dense frequency combs generated from continuous-wave lasers/
info:eu-repo/grantAgreement/MICINN//PRE-2019-087444
info:eu-repo/grantAgreement/MICINN//IJCI-2017-33856
info:eu-repo/grantAgreement/MICINN//RYC-2017-23668
info:eu-repo/grantAgreement/MICINN//IJC2018–035684-I
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Publisher's version
https://doi.org/10.1038/s41377-021-00490-0Rights
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
© 2021 The authors
Access rights
info:eu-repo/semantics/openAccess
Abstract
Phase-sensitive optical time-domain re
flectometry (ΦOTDR) is a well-established technique that provides spatiotemporal measurements of an environmental variable in real time. This unique capability is being leveraged in an everincreasing number of applications, from energy transportation or civil security to seismology. To date, a wide number
of different approaches have been implemented, providing a plethora of options in terms of performance (resolution,
acquisition bandwidth, sensitivity or range). However, to achieve high spatial resolutions, detection bandwidths in the
GHz range are typically required, substantially increasing the system cost and complexity. Here, we present a novel ΦOTDR approach that allows a customized time expansion of the received optical traces. Hence, the presented
technique reaches cm-scale spatial resolutions over 1 km while requiring a remarkably low detection bandwidth in the
MHz regime. This approach relies on the use of dual-comb spectrometry to interrogate the
fibre and sample the
backscattered light. Random phase-spectral coding is applied to the employed combs to maximize the signal-to-noise
ratio of the sensing scheme. A comparison of the proposed method with alternative approaches aimed at similar
operation features is provided, along with a thorough analysis of the new trade-offs. Our results demonstrate a
radically novel high-resolution
ΦOTDR scheme, which could promote new applications in metrology, borehole monitoring or aerospace.
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