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Proceedings Paper

Simultaneous gain and phase profile determination on an interferometric BOTDA
Author(s): X. Angulo-Vinuesa; A. Lopez-Gil; A. Dominguez-López; J. L. Cruz; M. V. Andres; S. Martin-Lopez; M. Gonzalez-Herraez
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Paper 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.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963419 (28 September 2015); doi: 10.1117/12.2192663
Show Author Affiliations
X. Angulo-Vinuesa, Univ. de Alcalá (Spain)
A. Lopez-Gil, Univ. de Alcalá (Spain)
A. Dominguez-López, Univ. de Alcalá (Spain)
J. L. Cruz, Univ. de València (Spain)
M. V. Andres, Univ. de València (Spain)
S. Martin-Lopez, Univ. de Alcalá (Spain)
M. Gonzalez-Herraez, Univ. de Alcalá (Spain)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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