Steady-sensitivity distributed acoustic sensors
Autores
Fernández Ruiz, María del Rosario; Fidalgo Martins, Hugo; Pereira da Costa, Luis Duarte; Martín López, Sonia; González Herráez, MiguelIdentificadores
Enlace permanente (URI): http://hdl.handle.net/10017/37812DOI: 10.1109/JLT.2018.2877849
ISSN: 0733-8724
Fecha de publicación
2018-12-01Patrocinadores
European Commission
Ministerio de Economía y Competitividad
Comunidad de Madrid
Cita bibliográfica
Fernández-Ruiz, M. R., Martins, H. F., Costa, L., Martín-López, S. & González-Herráez, M. 2018, "Steady-sensitivity distributed acoustic sensors", JLT, vol. 36, no. 23, pp. 5690-5696.
Palabras clave
Chirp modulation
Optical time domain reflectometry
Phase noise
Rayleigh scattering
Remote sensing
Proyectos
info:eu-repo/grantAgreement/EC/FP7/307441/EU/Ubiquitous optical FIbre NErves/U-FINE
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/MINECO//TEC2015-71127-C2-2-R/ES/REDUCCION DE LOS EFECTOS DE RUIDO EN SISTEMAS DE FIBRA OPTICA NO LINEALES/
info:eu-repo/grantAgreement/CAM//S2009%2FMIT2790/ES/Sensores e INstrumentación en tecnologías FOTÓNicas/SINFOTON
Tipo de documento
info:eu-repo/semantics/preprint
Versión
info:eu-repo/semantics/acceptedVersion
Versión del editor
http://dx.doi.org/10.1109/JLT.2018.2877849Derechos
Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
© 2018 IEEE
Derechos de acceso
info:eu-repo/semantics/openAccess
Resumen
Distributed acoustic sensors (DAS) based on phase-sensitive optical time-domain reflectometry (phiOTDR) have demonstrated interesting performance for many applications ranging from seismology to pipeline protection. However, the sensitivity of traditional DAS relying on coherent detection is strongly dependent on the system noise and trace fading points, offering poor reliability of the results in the spatial dimension. In this manuscript, we evaluate the statistical performance of a recently proposed DAS technique, namely, chirped-pulse phiOTDR, in terms of sensitivity and signal-to-noise ratio (SNR). Our results show behavioral trends that significantly differ from those of traditional DAS. In particular, the acoustic SNR distribution in chirped-pulse DAS is notably narrower than that in the traditional case, allowing to ensure a large system dynamic range across all the points of the optical trace. Hence, chirped-pulse phiOTDR offers localized perturbation detection with very high reliability, almost independent of trace fading points, along the complete reachable range of the sensor.
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