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

Autores
Fidalgo Martins, HugoAutor Universidad de Alcalá; Martín López, SoniaAutor Universidad de Alcalá; Filograno, M. L.; Corredera, Pedro; Frazão, O.; [et al.]
Identificadores
Enlace permanente (URI): http://hdl.handle.net/10017/26477
DOI: 10.1117/12.2059483
ISSN: 0277-786X
ISBN: 978-1-62841-175-1
Editor
Society of Photo Optical Instrumentation Engineers
Fecha de publicación
2014-06-02
Filiación
Universidad de Alcalá. Departamento de Electrónica
Patrocinadores
Ministerio de Economía y Competitividad
European Commission
Cita bibliográfica
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).
Palabras clave
Distributed sensor
Optical fiber sensors
Phase-sensitive OTDR
Vibration sensor
Raman scattering
Proyectos
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
Tipo de documento
info:eu-repo/semantics/conferenceObject
Versión
info:eu-repo/semantics/acceptedVersion
Versión del editor
http://dx.doi.org/10.1117/12.2059483
Derechos
Atribución-NoComercial-SinDerivadas 3.0 España
(c) 2009 Society of Photo Optical Instrumentation Engineers
Derechos de acceso
info:eu-repo/semantics/openAccess
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Resumen
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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