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    BOTDA measurements tolerant to non-local effects by using a phase-modulated probe wave and RF demodulation

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    Date
    2013
    Author
    Urricelqui Polvorinos, Javier Upna Orcid
    Sagüés García, Mikel Upna Orcid
    Loayssa Lara, Alayn Upna Orcid
    Version
    Acceso abierto / Sarbide irekia
    Type
    Artículo / Artikulua
    Version
    Versión publicada / Argitaratu den bertsioa
    Project Identifier
    ES/6PN/TEC2010-20224 
    Impact
     
     
     
    10.1364/OE.21.017186
     
     
     
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    Abstract
    We demonstrate a Brillouin optical time domain analysis sensor based on a phase modulated probe wave and RF demodulation that provides measurements tolerant to frequency dependent variations of the pump pulse power induced by non local effects. The tolerance to non local effects is based on the special characteristics of the detection process, which provides an RF phase shift signal that is large ... [++]
    We demonstrate a Brillouin optical time domain analysis sensor based on a phase modulated probe wave and RF demodulation that provides measurements tolerant to frequency dependent variations of the pump pulse power induced by non local effects. The tolerance to non local effects is based on the special characteristics of the detection process, which provides an RF phase shift signal that is largely independent of the Brillouin gain magnitude. Proof of concept experiments performed over a 20 km long fiber demonstrate that the measured RF phase shift spectrum remains unaltered for large frequency dependent deformations of the pump pulse power. Therefore, it allows the use of a higher optical power of the probe wave, which leads to an enhancement of the detected signal to noise ratio. This can be used to extend the sensing distance, to improve the accuracy of the Brillouin frequency shift measurements, and to reduce the measurement time. [--]
    Subject
    Stimulated Brillouin scattering, Fiber optics sensors, Heterodyne, Brillouin distributed sensors, Brillouin optical time domain analysis
     
    Publisher
    Optical Society of America
    Published in
    Optics Express, Vol. 21, Issue 14, pp. 17186-17194 (2013)
    Departament
    Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica / Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektriko eta Elektronikoa Saila
     
    Publisher version
    https://doi.org/10.1364/OE.21.017186
    URI
    https://hdl.handle.net/2454/22699
    Sponsorship
    The authors wish to acknowledge the financial support from the Spanish Ministerio de Educación y Ciencia through the project TEC2010-20224-C02-01, from the Spanish Ministerio de Economía y Competitividad through the project IPT-2011-12-920000 and from the Universidad Pública de Navarra.
    Appears in Collections
    • Artículos de revista - Aldizkari artikuluak [4315]
    • Artículos de revista DIEE - IEES Aldizkari artikuluak [359]
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