A reconstruction technique for long-range stimulated Brillouin scattering distributed fibre-optic sensors: experimental results
A reconstruction technique for long-range stimulated Brillouin scattering distributed fibre-optic sensors: experimental results
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DOI：
10.1088/0957-0233/16/4/002
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发表时间：
2005-04
影响因子：
2.4
通讯作者：
A. Minardo;R. Bernini;L. Zeni;L. Thévenaz;F. Briffod
中科院分区：
文献类型：
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作者：
A. Minardo;R. Bernini;L. Zeni;L. Thévenaz;F. Briffod
给出了一种基于布里渊光纤时域分析(BOTDA)传感器的温度/应变分布重建数值方法的实验验证。在这种方法中，我们直接搜索光纤上与测量数据匹配的布里渊频移分布。该算法基于未知轮廓的调和展开，其系数通过多维最小化来确定。为了揭示非定域性在布里渊测量中的影响，并证明所提出的算法能够补偿这些影响，进行了实验测量。
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.