dc.contributor.author | Domínguez López, Alejandro | |
dc.contributor.author | Zhisheng, Yang | |
dc.contributor.author | Soto Hernández, Marcelo Alfonso | |
dc.contributor.author | Angulo Vinuesa, Xabier | |
dc.contributor.author | Martín López, Sonia | |
dc.contributor.author | Thévenaz, Luc | |
dc.contributor.author | González Herráez, Miguel | |
dc.date.accessioned | 2016-09-30T17:38:42Z | |
dc.date.available | 2016-09-30T17:38:42Z | |
dc.date.issued | 2016-05-02 | |
dc.identifier.bibliographicCitation | Optics Express, 2016, v. 24, n.10, p. 10188-10204. | |
dc.identifier.issn | 1094-4087 | |
dc.identifier.uri | http://hdl.handle.net/10017/26277 | |
dc.description.abstract | Systematic errors induced by distortions in the pump pulse of
conventional Brillouin distributed fiber sensors are thoroughly investigated.
Experimental results, supported by a theoretical analysis, demonstrate that
the two probe sidebands in standard Brillouin optical time-domain analyzers
provide a non-zero net gain on the pump pulse, inducing severe distortions
of the pump when scanning the pump-probe frequency offset, especially at
high probe power levels. Compared to the impact of non-local effects
reported in the state-of-the-art, measurements here indicate that for probe
powers in the mW range (below the onset of amplified spontaneous
Brillouin scattering), the obtained gain and loss spectra show two strong
side-lobes that lead to significant strain/temperature errors. This
phenomenon is not related to the well-known spectral hole burning resulting
from pump depletion, but it is strictly related to the temporal and spectral
distortions that the pump pulse experiences when scanning the Brillouin
gain/loss spectrum. As a solution to this problem, a novel scanning scheme
for Brillouin sensing is proposed. The method relies on a fixed frequency
separation between the two probe sidebands, so that a flat zero net gain is
achieved on the pump pulse when scanning the pump-probe frequency
offset. The proposed technique is experimentally validated, demonstrating
its ability to completely cancel out non-local effects up to a probe power
ultimately limited by the onset of amplified spontaneous Brillouin
scattering. The method allows for one order of magnitude improvement in
the figure-of-merit of optimized long-range Brillouin distributed fiber
sensors, enabling measurements along a 100 km-long sensing fiber with 2
m spatial resolution and with no need of added features for performance
enhancement. | en |
dc.description.sponsorship | European Commission | en |
dc.description.sponsorship | Ministerio de Economía y Competitividad | es_ES |
dc.description.sponsorship | Comunidad de Madrid | es_ES |
dc.format.mimetype | application/pdf | en |
dc.language.iso | eng | en |
dc.publisher | Optical Society of America | en |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
dc.subject | Fiber optics sensors | en |
dc.subject | Scattering | en |
dc.subject | Nonlinear optics | en |
dc.subject | Stimulated Brillouin | en |
dc.subject | Fibers | en |
dc.title | Novel scanning method for distortion-free BOTDA measurements | en |
dc.type | info:eu-repo/semantics/article | en |
dc.subject.eciencia | Ciencias tecnológicas | es_ES |
dc.subject.eciencia | Electrónica | es_ES |
dc.subject.eciencia | Technology | en |
dc.subject.eciencia | Electronics | en |
dc.contributor.affiliation | Universidad de Alcalá. Departamento de Electrónica | es_ES |
dc.relation.publisherversion | https://doi.org/10.1364/OE.24.010188 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | en |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//TEC2013-45265-R/ES/DETECCION TEMPRANA DE AMENAZAS PARA INFRAESTRUCTURAS CRITICAS USANDO SISTEMAS DISTRIBUIDOS DE FIBRA OPTICA/ | en |
dc.relation.projectID | info:eu-repo/grantAgreement/CAM//S2009%2FMIT2790/ES/Sensores e INstrumentación en tecnologías FOTÓNicas/SINFOTON | en |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/FP7/307441/EU/Ubiquitous optical FIbre NErves/U-FINE | en |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | en |