Highly sensitive distributed birefringence measurements based on a two-pulse interrogation of a dynamic Brillouin grating

Authors
Denisov, A.; Angulo Vinuesa, XabierUniversity of Alcalá Author; Martín López, SoniaUniversity of Alcalá Author; Thévenaz, Luc; González Herráez, MiguelUniversity of Alcalá Author; [et al.]
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/30895
DOI: 10.1117/12.2267471
ISSN: 0277-786X
ISBN: 978-1-51061-091-0
Publisher
SPIE
Date
2017
Embargo end date
2018-04-23
Affiliation
Universidad de Alcalá. Departamento de Electrónica
Bibliographic citation
Soto, M.A., Denisov, A., Angulo-Vinuesa, X., Martin-Lopez, S., Thévenaz, L., Gonzalez-Herraez, M., 2017, "Highly sensitive distributed birefringence measurements based on a two-pulse interrogation of a dynamic Brillouin grating" Proceedings of SPIE - The International Society for Optical Engineering, 10323, art. no. 103238Z
Keywords
Birefringence
Brillouin scattering
Distributed fibre sensor
Fibre optics
Optical fibre sensors
Document type
info:eu-repo/semantics/conferenceObject
Version
info:eu-repo/semantics/acceptedVersion
Publisher's version
http://dx.doi.org/10.1117/12.2267471
Rights
Atribución-NoComercial-SinDerivadas 4.0 España
(c) Society of Photo-Optical Instrumentation Engineers (SPIE), 2017
Access rights
info:eu-repo/semantics/openAccess
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Abstract
A method for distributed birefringence measurements is proposed based on the interference pattern generated by the interrogation of a dynamic Brillouin grating (DBG) using two short consecutive optical pulses. Compared to existing DBG interrogation techniques, the method here offers an improved sensitivity to birefringence changes thanks to the interferometric effect generated by the reflections of the two pulses. Experimental results demonstrate the possibility to obtain the longitudinal birefringence profile of a 20 m-long Panda fibre with an accuracy of ∼10-8 using 16 averages and 30 cm spatial resolution. The method enables inf-metric and highly-accurate distributed temperature and strain sensing.
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