Simple BOTDA temperature sensor based on distributed Brillouin phase-shift measurements within a Sagnac interferometer

Alexia López-Gil; Xabier Angulo-Vinuesa; Alejandro Dominguez-López; Sonia Martín-López; Miguel González-Herráez

doi:10.1117/12.2192977

28 September 2015 Simple BOTDA temperature sensor based on distributed Brillouin phase-shift measurements within a Sagnac interferometer

Alexia López-Gil, Xabier Angulo-Vinuesa, Alejandro Dominguez-López, Sonia Martín-López, Miguel González-Herráez

Author Affiliations +

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96346L (2015) https://doi.org/10.1117/12.2192977
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

In this work we demonstrate an extremely simple BOTDA scheme capable of delivering distributed Brillouin Phase Shift measurements along an optical fiber. It is based on exploiting the non-reciprocity of the Stimulated Brillouin Scattering effect. This non-reciprocity is easily characterized by means of a suitably tuned Sagnac Interferometer. The technique is advantageous as, in comparison with previous methods, no complex modulation, no sharp filtering and no highbandwidth detection is needed. Theoretical and experimental proofs of the concept are given.

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Alexia López-Gil, Xabier Angulo-Vinuesa, Alejandro Dominguez-López, Sonia Martín-López, and Miguel González-Herráez "Simple BOTDA temperature sensor based on distributed Brillouin phase-shift measurements within a Sagnac interferometer", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96346L (28 September 2015); https://doi.org/10.1117/12.2192977

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