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Evaluation of the accuracy of BOTDA systems based on the phase spectral response

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Academic year: 2020

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Fig. 1. Schematic representation of the BGS/BLS (gain - loss) and BPS (phase) including their  dependence with increased strain Ɛ or temperature T
Fig. 2. Graphical representation of experimental gain and phase profiles obtained  simultaneously through the SI-BOTDA presented in [12]
Fig. 3. Temporal normalized gain trace obtained with a standard BOTDA sensor. Noisy and  ideal gain (b) and phase (c) profiles
Fig. 4. Linear and quadratic BFS determination error vs. the number of fitting points
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