Journal
OPTICAL ENGINEERING
Volume 41, Issue 9, Pages 2186-2194Publisher
SPIE-INT SOCIETY OPTICAL ENGINEERING
DOI: 10.1117/1.1497176
Keywords
Brillouin scattering; nonlinear optics, optical fiber measurements, strain measurements; temperature measurements
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A novel numerical technique for temperature/strain profiles reconstruction based on Brillouin optical-fiber time-domain analysis (BOTDA) sensors is proposed. In this approach, we search directly for the temperature/strain profile along the fiber that matches the measured data. The algorithm is based on a harmonic expansion of the unknown profile, whose coefficients are determined by a multidimensional minimization. Several numerical simulations, even in presence of noise, prove the capability of the proposed algorithm to compensate for some systematic errors suffered by classical approaches based on the direct reading of Brillouin power spectra. (C) 2002 Society of Photo-Optical Instrumentation Engineers.
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