Comparison of the use of first and second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer in distributed vibration sensing over 125 km

Authors
Fidalgo Martins, HugoUniversity of Alcalá Author; Martín López, SoniaUniversity of Alcalá Author; Filograno, M. L.; Corredera, Pedro; Frazão, O.; [et al.]
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/26477
DOI: 10.1117/12.2059483
ISSN: 0277-786X
ISBN: 978-1-62841-175-1
Publisher
Society of Photo Optical Instrumentation Engineers
Date
2014-06-02
Affiliation
Universidad de Alcalá. Departamento de Electrónica
Funders
Ministerio de Economía y Competitividad
European Commission
Bibliographic citation
H.F. Martins, S. Martín-López, M.L. Filograno, P. Corredera, O. Frazão, M.González-Herráez "Comparison of the use of first and second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer in distributed vibration sensing over 125 km",Proc. SPIE 9157, 91576K (2014).
Keywords
Distributed sensor
Optical fiber sensors
Phase-sensitive OTDR
Vibration sensor
Raman scattering
Project
info:eu-repo/grantAgreement/MINECO//TEC2012-37958-C02-01/ES/TECNOLOGIAS DE SEGURIDAD CIVIL BASADAS EN FIBRA OPTICA/
info:eu-repo/grantAgreement/MINECO//TEC2012-37958-C02-02/ES/TECNOLOGIAS DE FIBRA OPTICA PARA LA SEGURIDAD CIVIL/
info:eu-repo/grantAgreement/EC/Interreg Sudoe/SOE3%2FP2%2FP714/EU/Gestión ecológica de pilas de residuos de carbón en combustión/ECOAL-MGT
Document type
info:eu-repo/semantics/conferenceObject
Version
info:eu-repo/semantics/acceptedVersion
Publisher's version
http://dx.doi.org/10.1117/12.2059483
Rights
Atribución-NoComercial-SinDerivadas 3.0 España
(c) 2009 Society of Photo Optical Instrumentation Engineers
Access rights
info:eu-repo/semantics/openAccess
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Abstract
We report on the use of second-order Raman amplification to assist a phase-sensitive optical time domain reflectometer ( φOTDR ) used for vibration measurements over very long distances. 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 no postprocessing. Balanced detection is used to reduce the relative intensity noise. A comparison with a sensor using first-order Raman amplification under similar conditions is presented and a clear improvement of performance is demonstrated.
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