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Proceedings Paper

Gain vs phase in BOTDA setups
Author(s): Alexia Lopez-Gil; Xabier Angulo-Vinuesa; Marcelo A. Soto; Alejandro Dominguez-Lopez; Sonia Martin-Lopez; Luc Thévenaz; Miguel Gonzalez-Herraez
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Paper Abstract

We evaluate the Brillouin frequency shift (BFS) determination error when using the Brillouin phase spectrum (BPS) instead of the Brillouin gain spectrum (BGS) in BOTDA setups. We compare the error obtained in the BFS determination in both cases, both with theoretical arguments and experimental data. In comparison to the gain, for an equal SNR and linewidth, the phase generally provides a better fit of the BFS for smaller frequency spans. This result opens a possible way to reduce the measurement time of certain BOTDA systems by using the phase feature.

Paper Details

Date Published: 30 May 2016
PDF: 4 pages
Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991631 (30 May 2016); doi: 10.1117/12.2236890
Show Author Affiliations
Alexia Lopez-Gil, Univ. de Alcalá (Spain)
Xabier Angulo-Vinuesa, Univ. de Alcalá (Spain)
Marcelo A. Soto, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Alejandro Dominguez-Lopez, Univ. de Alcalá (Spain)
Sonia Martin-Lopez, Univ. de Alcalá (Spain)
Luc Thévenaz, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Miguel Gonzalez-Herraez, Univ. de Alcalá (Spain)

Published in SPIE Proceedings Vol. 9916:
Sixth European Workshop on Optical Fibre Sensors
Elfed Lewis, Editor(s)

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