Time Expansion in Distributed Optical Fiber Sensing
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Altres documents de l'autoria: Fernández Ruiz, María del Rosario; Soriano-Amat, Miguel; Durán, Vicente; Martins, Hugo; Martin-Lopez, Sonia; Gonzalez-Herraez, Miguel
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Time Expansion in Distributed Optical Fiber SensingAutoria
Data de publicació
2023-05-01Editor
Institute of Electrical and Electronics EngineersISSN
1558-2213Cita bibliogràfica
M. R. Fernández-Ruiz, M. Soriano-Amat, V. Durán, H. F. Martins, S. Martin-Lopez and M. Gonzalez-Herraez, "Time Expansion in Distributed Optical Fiber Sensing," in Journal of Lightwave Technology, vol. 41, no. 11, pp. 3305-3315, 1 June1, 2023, doi: 10.1109/JLT.2023.3245218.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://opg.optica.org/abstract.cfm?uri=jlt-41-11-3305Versió
info:eu-repo/semantics/acceptedVersionParaules clau / Matèries
Resum
Distributed optical fiber sensing (DOFS) technology has recently experienced an impressive growth in various fields including security, structural monitoring and seismology, among others. This expansion has been ... [+]
Distributed optical fiber sensing (DOFS) technology has recently experienced an impressive growth in various fields including security, structural monitoring and seismology, among others. This expansion has been accompanied by a speedy development of the technology in the last couple of decades, reaching remarkable performance in terms of sensitivity, range, number of independent sensing points and affordable cost per monitored point as compared with competing technologies such as electrical or point optical sensors. Phase-sensitive Optical Time-Domain Reflectometry (φOTDR) is a particularly interesting DOFS technique, since it enables real-time monitoring of dynamic variations of physical parameters over a large number of sensing points. Compared to their frequency-domain counterparts (OFDR), φOTDR sensors typically provide higher dynamics and longer ranges but significantly worse spatial resolutions. Very recently, a novel φOTDR approach has been introduced, which covers an existing gap between the long range and fast response of φOTDR and the high spatial resolution of OFDR. This technique, termed time-expanded (TE) φOTDR, exploits an interferometric scheme that employs two mutually coherent optical frequency combs. In TE-φOTDR, a probe comb is launched into the fiber under test. The beating of the backscattered light and a suitable LO comb produces a multi-heterodyne detection process that compresses the spectrum of the probe comb, in turn expanding the detected optical traces in the time-domain. This approach has allowed sensing using φOTDR technology with very high resolution (in the cm scale), while requiring outstandingly low detection and acquisition bandwidths (sub-MHz). In this work, we review the fundamentals of TE-φOTDR technology and describe the recent developments, focusing on the attainable sensing performance, the existing trade-offs and open working lines of this novel sensing approach. [-]
Publicat a
Journal of Lightwave Technology, 2023, vol. 41, no 11Entitat finançadora
Ministerio de Ciencia e Innovación | Ministerio de Ciencia, Innovación y Universidades | Comunidad de Madrid | Generalitat Valenciana | Universitat Jaume I | European Union
Identificador de l'entitat finançadora
10.13039/501100011033
Codi del projecte o subvenció
MCIN/PEICTI2021-2023/RYC2021-032167-I | MCIN/PEICTI2021-2023/RYC2021-035009-I | MICIU/ICTI2017-2020/PRE-2019-087444 | MICIU/ICTI2017-2020/RYC-2017-23668 | SINFOTON2-CM: S2018/NMT-4326 | PROMETEO/2020/029 | UJIB2022-53 | MCIN/PEICTI2021-2023/PLEC2021-007875 | MCIN/PEICTI2021-2023/CPP2021-008869 | MCIN/PEICTI2021-2023/PID2021-128000OB-C21 | MCIN/PEICTI2021-2023/PID2021-128000OB-C22 | MCIN/PEICTI2021-2023/PID2021-124814NB-C22 | info:eu-repo/grantAgreement//EC/HE/101098992
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