28 September 2015 Simultaneous gain and phase profile determination on an interferometric BOTDA
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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 963419 (2015) https://doi.org/10.1117/12.2192663
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil
Abstract
Up to now, complex (phase and intensity) measurements in Brillouin Optical Time-Domain Analysis (BOTDA) systems required complex phase modulation methods and high-bandwidth (multi-GHz) detection. In this work, we propose a novel technique that is able to retrieve simultaneously both gain/loss and phase characteristics of the Brillouin interaction by just introducing a Sagnac Interferometer (SI) on a standard BOTDA sensing scheme. The technique is described analytically and demonstrated experimentally. With this technique, a reliability increase is produced since redundant measurements can be performed.
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X. Angulo-Vinuesa, X. Angulo-Vinuesa, A. Lopez-Gil, A. Lopez-Gil, A. Dominguez-López, A. Dominguez-López, J. L. Cruz, J. L. Cruz, M. V. Andres, M. V. Andres, S. Martin-Lopez, S. Martin-Lopez, M. Gonzalez-Herraez, M. Gonzalez-Herraez, } "Simultaneous gain and phase profile determination on an interferometric BOTDA ", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963419 (28 September 2015); doi: 10.1117/12.2192663; https://doi.org/10.1117/12.2192663
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