Distributed vibration sensing over 125 km with enhanced SNR using Phi-OTDR over a URFL cavity
Authors
Fidalgo Martins, Hugo; Martín López, Sonia; Corredera, Pedro; Ania Castañón, Juan Diego; Frazão, O.; [et al.]Identifiers
Permanent link (URI): http://hdl.handle.net/10017/26309DOI: 10.1109/JLT.2015.2396359
ISSN: 0733-8724
Publisher
IEEE
Date
2015-06-15Funders
Ministerio de Economía y Competitividad
Ministerio de Ciencia e Innovación
Comunidad de Madrid
European Commission
Bibliographic citation
Hugo F. Martins, Sonia Martin-Lopez, Pedro Corredera, Juan Diego Ania-Castañon, Orlando Frazão,
and Miguel Gonzalez-Herraez "Distributed vibration sensing over 125 km with enhanced SNR using Phi-OTDR over a URFL cavity", Journal of Lightwave Technology, 2015, Vol. 33, issue 12, pp.2628-2632.
Keywords
Distributed sensor
Optical fiber sensors
Phasesensitive OTDR
Raman scattering
Vibration sensor
Project
info:eu-repo/grantAgreement/MINECO//TEC2012-37958-C02-01/ES/TECNOLOGIAS DE SEGURIDAD CIVIL BASADAS EN FIBRA OPTICA/
info:eu-repo/grantAgreement/MICINN//TEC2011-27314/ES/TECNOLOGIAS DE FIBRA OPTICA ASISTIDAS POR EFECTO RAMAN/
info:eu-repo/grantAgreement/MINECO/TEC2013-45265-R/ES/DETECCION TEMPRANA DE AMENAZAS PARA INFRAESTRUCTURAS CRITICAS USANDO SISTEMAS DISTRIBUIDOS DE FIBRA OPTICA/
info:eu-repo/grantAgreement/CAM//S2009%2FMIT2790/ES/Sensores e INstrumentación en tecnologías FOTÓNicas/SINFOTON
info:eu-repo/grantAgreement/EC/FP7/307441/EU/Ubiquitous optical FIbre NErves/U-FINE
info:eu-repo/grantAgreement/EC/FP7/608099/EU/Allied Initiative for Training and Education in Coherent Optical Networks/ICONE
info:eu-repo/grantAgreement/EC/Interreg Sudoe/SOE3%2FP2%2FP714/EU/Gestión ecológica de pilas de residuos de carbón en combustión/ECOAL-MGT
info:eu-repo/grantAgreement/MINECO//TEC2012-37958-C02-02/ES/TECNOLOGIAS DE FIBRA OPTICA PARA LA SEGURIDAD CIVIL/
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/acceptedVersion
Publisher's version
http://dx.doi.org/10.1109/JLT.2015.2396359Access rights
info:eu-repo/semantics/openAccess
Abstract
We describe the use of a phase-sensitive optical time domain reflectometer (φOTDR) over an ultra-long Raman fiber laser cavity allowing fully distributed detection of vibrations over 125 km. Compared to a first-order Raman-assisted φOTDR, this scheme shows an enhanced signal-to-noise ratio (SNR). This is due to the fact that the relative intensity noise introduced by the Raman amplification is mostly transferred to a lower frequency range, where the balanced detection implemented in the setup provides better suppression of the common-mode noise. The sensor was able to measure vibrations of up to 380 Hz (limit set by the time of flight of light pulses) in a distance of 125 km with a resolution of 10 m and an average SNR of 8 dB with no postprocessing. This implies a >3 dB improvement in SNR over a first-order Raman-assisted setup with similar characteristics
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