Brillouin frequency shift estimation in BOTDA via subpixel processing

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URI: http://hdl.handle.net/10902/10802
ISSN: 0277-786X
ISSN: 1996-756X
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Autoría
Ruiz Lombera, RubénAutoridad Unican; Mirapeix Serrano, Jesús MaríaAutoridad Unican; Laarossi, IsmailAutoridad Unican; Rodríguez Cobo, LuisAutoridad Unican; López Higuera, José MiguelAutoridad Unican
Fecha
2016
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Copyright 2016 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Publicado en
Proceedings of SPIE, 2016, 9916, 99162L
Sixth European Workshop on Optical Fibre Sensors, Limerick, Ireland, 2016
Editorial
SPIE Society of Photo-Optical Instrumentation Engineers
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Palabras clave
Stimulated Brillouin scattering
Distributed sensing
BOTDA
Brillouin frequency shift
Sub-pixel algorithm
Lorentzian fitting
Resumen/Abstract
In this paper we propose the employment of sub-pixel algorithms for the estimation of the central frequency of the Brillouin Gain Spectrum in a Brillouin Optical Time Domain Analyzer. The experimental results will show that the proposed solution shows a good performance when the chosen frequency step for the required frequency sweep is high. If the improved computational efficiency in comparison to the traditional Lorentzian fitting is also considered, it can be concluded that this approach may be of great interest for dynamic measurement scenarios.
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