Evaluation of the accuracy of BOTDA systems based on the phase spectral response
Autores
López Gil, Alexia Inés; Soto Hernández, Marcelo Alfonso; Angulo Vinuesa, Xabier; Domínguez López, Alejandro; Martín López, Sonia; [et al.]Identificadores
Enlace permanente (URI): http://hdl.handle.net/10017/26237DOI: 10.1364/OE.24.017200
ISSN: 1094-4087
Editor
Optical Society of America
Fecha de publicación
2016-07-25Patrocinadores
Ministerio de Economía y Competitividad
Comunidad de Madrid
European Commission
Cita bibliográfica
Lopez-Gil, Alexia; Soto, Marcelo A.; Angulo-Vinuesa, Xabier; Dominguez-Lopez, Alejandro; Martin-Lopez, Sonia; Thévenaz, Luc; M.Gonzalez-Herraez "Evaluation of the accuracy of BOTDA systems based on the phase spectral response" , Optics Express, 2016, vol. 24, n.15, p.17200-17214
Palabras clave
Fiber optics
Fiber optics sensors
Scattering
stimulated Brillouin
Nonlinear optics
fibers
Proyectos
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/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
info:eu-repo/grantAgreement/EC/FP7/307441/EU/Ubiquitous optical FIbre NErves/U-FINE
info:eu-repo/grantAgreement/EC/H2020/ /EU/Water JPI/Dikes and Debris Flows Monitoring by Novel Optical Fiber Sensors/DOMINO
Tipo de documento
info:eu-repo/semantics/article
Versión
info:eu-repo/semantics/publishedVersion
Derechos de acceso
info:eu-repo/semantics/openAccess
Resumen
We evaluate the Brillouin frequency shift (BFS) determination error when utilizing
the Brillouin phase spectrum (BPS) instead of the Brillouin gain spectrum (BGS) in BOTDA
systems. Systems based on the BPS perform the determination of the BFS through a linear fit
around the zero de-phase frequency region. An analytical expression of the error obtained in
the BFS determination as a function of the different experimental parameters is provided and
experimentally validated. The experimental results show a good agreement with the
theoretical predictions as a function of the number of sampling points, signal-to-noise ratio
(SNR) and Brillouin spectral linewidth. For an equal SNR and linewidth, the phase response
only provides a better BFS estimation than the gain response when the fit is performed over a
restricted frequency range around the center of the spectral profile. This may reduce the
measurement time of specific BOTDA systems requiring a narrow frequency scanning. When
the frequency scan covers most of the Brillouin spectral profile, gain and phase responses
give very similar estimations of the BFS and the BPS offers no crucial benefit.
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