Brillouin frequency shift estimation in BOTDA via subpixel processing
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AuthorRuiz Lombera, Rubén; Mirapeix Serrano, Jesús María; Laarossi, Ismail; Rodríguez Cobo, Luis; López Higuera, José Miguel
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.
Proceedings of SPIE, 2016, 9916, 99162L
Sixth European Workshop on Optical Fibre Sensors, Limerick, Ireland, 2016
SPIE Society of Photo-Optical Instrumentation Engineers
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Stimulated Brillouin scattering
Brillouin frequency shift
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.