Cancellation of reference update-induced 1/f noise in a chirped-pulse DAS
Authors
Vidal Moreno, Pedro Jose; Rochat, Etienne; Fermoso Santos, Pablo; Fernández Ruiz, María Del Rosario; Fidalgo Martins, Hugo; [et al.]Identifiers
Permanent link (URI): http://hdl.handle.net/10017/58201DOI: 10.1364/OL.465367
ISSN: 0146-9592
Publisher
OSA
Date
2022-07-13Funders
Comunidad de Madrid
Ministerio de Ciencia e Innovación
Universidad de Alcalá
Bibliographic citation
Vidal Moreno, P.J., Rochat, E., Fermoso, P., Fernández Ruiz, M.R., Martins, H., Martín López, S., Ocaña, M. & González Herráez, M. 2022, "Cancellation of reference update-induced 1/f noise in a chirped-pulse DAS", Optics Letters, vol. 47, no. 14, pp. 3588-3591.
Project
info:eu-repo/grantAgreement/CAM//S2018%2FNMT4326/ES/SENSORES E INSTRUMENTACION EN TECNOLOGIAS FOTONICAS2/SINFOTON2
info:eu-repo/grantAgreement/MICINN//PLEC2021-007875/ES/SISTEMA DE MONITORIZACION PARA LA PROTECCION Y MANTENIMIENTO PREDICTIVO DE INFRAESTRUCTURAS DE CABLE SUBMARINO/PSI
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-C33/ES/TECNICAS AVANZADAS DE GENERACION, AMPLIFICACION Y MEDIDA DE SEÑALES OPTICAS COMPLEJAS EN FIBRA OPTICA/
info:eu-repo/grantAgreement/MICINN// IJC2018–035684-I
UAH-FPI program. 2020/00198/001 - UAH INFR. A 2020-007
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/acceptedVersion
Publisher's version
https://doi.org/10.1364/OL.465367Rights
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
© 2022 Optical Society of America
Access rights
info:eu-repo/semantics/openAccess
Abstract
Distributed acoustic sensors (DAS) perform distributed and dynamic strain or temperature change measurements by comparing a measured time-domain trace with a previous fiber reference state. Large strain or temperature fluctuations or laser frequency noise impose the need to update such a reference, making it necessary to integrate the short-term variation measurements if absolute strain or temperature variations are to be obtained. This has the drawback of introducing a 1/f noise component, as noise is integrated with each cumulative variation measurement, which is detrimental to the determination of very slow processes (i.e., in the mHz frequency range or below). This work analyzes the long-term stability of chirped-pulse phase-sensitive optical time-domain reflectometry (CP-?OTDR) with multi-frequency database demodulation (MFDD) to carry out "calibrated" measurements in a DAS along an unmodified SMF. It is shown that, under the conditions studied in this work, a "calibrated" chirped-pulse DAS (CP-DAS) with a completely suppressed reference update-induced 1/f noise component is achieved capable of making measurements over periods of more than 2 months with the same set of references, even when switching off the interrogator during the measurement.
Files in this item
Files | Size | Format |
|
---|---|---|---|
Cancellation_Vidal_Opt_Lett_20 ... | 1.336Mb |
|
Files | Size | Format |
|
---|---|---|---|
Cancellation_Vidal_Opt_Lett_20 ... | 1.336Mb |
|
Collections
- ELECTRON - Artículos [245]
- INGFOTON - Artículos [108]