A reconstruction technique for long-range stimulated Brillouin scattering distributed fibre-optic sensors: Experimental results

The experimental validation of a numerical technique for temperature/strain profile reconstruction based on Brillouin optical-fibre time-domain analysis (BOTDA) sensors is presented. In this approach, we search directly for the Brillouin frequency shift profile along the fibre that matches the measured data. The algorithm is based on a harmonic expansion of the unknown profile, whose coefficients are determined by means of a multidimensional minimization. Experimental measurements have been carried out in order to reveal the influence of nonlocalities in Brillouin measurements, and to prove the capability of the proposed algorithm to compensate for these effects


Published in:
Measurement Science & Technology, 16, 4, 900-8
Year:
2005
Publisher:
Institute of Physics
ISSN:
0957-0233
Keywords:
Note:
Dipt. di Ingegneria dell'Informazione, Seconda Univ. di Napoli, Aversa, Italy Copyright 2005, IEE 8422073 0957-0233 long-range stimulated Brillouin scattering distributed fiber-optic sensors temperature profiles reconstruction strain profiles reconstruction optical-fiber time-domain analysis sensors Brillouin frequency shift profile unknown profile harmonic expansion multidimensional minimization distributed temperature sensors distributed strain sensors Brillouin gain coefficient pulse intensity profile truncated Fourier series iterative solution
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 Record created 2008-09-29, last modified 2018-09-13

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