Time-expanded φOTDR using low-frequency electronics
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Time-expanded φOTDR using low-frequency electronicsAutoría
Fecha de publicación
2023-01Editor
Optica Publishing GroupCita bibliográfica
Miguel Soriano-Amat, Hugo F. Martins, Sonia Martin-Lopez, Miguel Gonzalez-Herraez, María R. Fernández-Ruiz, and Vicente Durán, "Time-expanded φOTDR using low-frequency electronics," Opt. Express 31, 843- 852 (2023)Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://opg.optica.org/oe/fulltext.cfm?uri=oe-31-2-843&id=524659Versión
info:eu-repo/semantics/publishedVersionResumen
Time expanded phase-sensitive optical time-domain reflectometry (TE-φOTDR) is a
recently reported technique for distributed optical fiber sensing based on the interference of two
mutually coherent optical frequency ... [+]
Time expanded phase-sensitive optical time-domain reflectometry (TE-φOTDR) is a
recently reported technique for distributed optical fiber sensing based on the interference of two
mutually coherent optical frequency combs. This approach enables distributed acoustic sensing
with centimeter resolution while keeping the detection bandwidth in the megahertz range. In this
paper, we demonstrate that TE-φOTDR can be realized with low-frequency electronics for both
signal generation and detection. This achievement is possible thanks to the use of a couple of
electro-optic comb generators driven by commercially available step recovery diodes. These
components are fed by radio frequencies that are orders of magnitude lower than those involved
in the signals so far originated by ultrafast waveform generation. The result is a simple, compact,
low-cost and potentially field-deployable sensor that works without resorting to any decoding
algorithm. Besides, high-resolution distributed sensing is carried out with no need of coding
strategies or enhanced backscatter fibers. To check the capabilities of our system, we perform
distributed strain sensing over a range of 20 m. The spatial resolution is 3 cm and the acoustic
sampling rate can be increased up to 200 Hz. This performance reveals the prospective of the
proposed approach for field applications, including structural health monitoring. [-]
Publicado en
Optics Express, Vol. 31, Issue 2, pp. 843- 852 (2023)Entidad financiadora
Comunidad de Madrid | Generalitat Valenciana | Universitat Jaume I | European Union Next Generation EU/PRTR Program | HORIZON EUROPE European Innovation Council | MCIN/AEI
Código del proyecto o subvención
SINFOTON2-CM: S2018/NMT-4326 | PROMETEO/2020/029 | UJI-B2019-45 | PLEC2021-007875 | CPP2021-008869 | 101098992 | PID2021-124814NB-C22 | PID2021-128000OB-C21 | PID2021-128000OB-C22 | RTI2018-097957B-C31 | RTI2018-097957-B-C32 | RTI2018-097957-B-C33
Derechos de acceso
© 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
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