Balanced detection in Brillouin optical time domain analysis

Authors
Domínguez López, AlejandroUniversity of Alcalá Author; López Gil, Alexia InésUniversity of Alcalá Author; Martín López, SoniaUniversity of Alcalá Author; González Herráez, MiguelUniversity of Alcalá Author
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/27560
DOI: 10.1117/12.2059295
ISSN: 0277-786X
ISBN: 978-162841175-1
Publisher
Society of Photo-Optical Instrumentation Engineers (SPIE)
Date
2014-06-02
Affiliation
Universidad de Alcalá. Departamento de Electrónica
Funders
Ministerio de Ciencia e Innovación
European Commission
Comunidad de Madrid
Bibliographic citation
Alejandro Dominguez-Lopez ; Alexia Lopez-Gil ; Sonia Martin-Lopez ; Miguel Gonzalez-Herraez; Balanced detection in Brillouin optical time domain analysis. Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915765 (June 2, 2014).
Keywords
Balanced detection
Brillouin scattering
Distributed optic fiber sensor
Raman scattering
Temperature sensor
Project
info:eu-repo/grantAgreement/MICINN//TEC2009-14423-C02-01/ES/Aplicacion Del Laser Femto Fibre Comb A La Metrologia De Frecuencias Para Comunicaciones Opticas/
info:eu-repo/grantAgreement/EC/FP7/307441/EU/Ubiquitous optical FIbre NErves/U-FINE
info:eu-repo/grantAgreement/CAM//S2009%2FESP1781/ES//FACTOTEM2
Document type
info:eu-repo/semantics/conferenceObject
Version
info:eu-repo/semantics/acceptedVersion
Publisher's version
http://dx.doi.org/10.1117/12.2059295
Rights
Atribución-NoComercial-SinDerivadas 3.0 España
(c) 2014 SPIE
Access rights
info:eu-repo/semantics/openAccess
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Abstract
We propose the use of balanced detection in Brillouin Optical Time Domain Analysis (BOTDA) sensors. Balanced detection can be effectively accomplished among the Stokes and anti-Stokes bands in the probe signal. This type of detection leads to a doubling of the trace amplitude and at least a √2 increase in signal to noise ratio over the conventional configuration. Moreover, it leads to a complete cancellation of the common-mode noise in the probe signal, including relative intensity noise in Raman-assisted configurations. We show all these benefits both theoretically and experimentally
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