Simultaneous gain and phase profile determination on an interferometric BOTDA

X. Angulo-Vinuesa; A. Lopez-Gil; A. Dominguez-López; J. L. Cruz; M. V. Andres; S. Martin-Lopez; M. Gonzalez-Herraez

doi:10.1117/12.2192663

28 September 2015 Simultaneous gain and phase profile determination on an interferometric BOTDA

X. Angulo-Vinuesa, A. Lopez-Gil, A. Dominguez-López, J. L. Cruz, M. V. Andres, S. Martin-Lopez, M. Gonzalez-Herraez

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.

Citation Download Citation

X. Angulo-Vinuesa, A. Lopez-Gil, A. Dominguez-López, J. L. Cruz, M. V. Andres, S. Martin-Lopez, and 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); https://doi.org/10.1117/12.2192663

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