Expanding the sensing capabilities of forward Brillouin scattering in optical fibers by exploiting the differential response of radial and torsional-radial acoustic modes

Luis A. Sánchez; Antonio Díez; José Luis Cruz; Miguel V. Andrés

doi:10.1117/12.2680762

23 May 2023 Expanding the sensing capabilities of forward Brillouin scattering in optical fibers by exploiting the differential response of radial and torsional-radial acoustic modes

Luis A. Sánchez, Antonio Díez, José Luis Cruz, Miguel V. Andrés

Author Affiliations +

Proceedings Volume 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023); 1264306 (2023) https://doi.org/10.1117/12.2680762
Event: European Workshop on Optical Fibre Sensors (EWOFS 2023), 2023, Mons, Belgium

Abstract

The capabilities of optical fiber sensing based on forward Brillouin scattering (FBS) can be extended by exploiting the differential response to fiber perturbations of radial and torsional-radial acoustic modes. Radial and a subfamily of torsional-radial modes present a different sensitivity to changes of temperature and strain. By combining experimental measurements of the resonance frequencies of the different acoustic modes, we obtain (1) the Poison ratio of the optical fiber with an accuracy better than 1‰, and its temperature and strain responses, and (2), we demonstrate simultaneous and discriminative measurements of strain and temperature with accuracy better than 25 με and 0.2 °C, respectively.

Citation Download Citation

Luis A. Sánchez, Antonio Díez, José Luis Cruz, and Miguel V. Andrés "Expanding the sensing capabilities of forward Brillouin scattering in optical fibers by exploiting the differential response of radial and torsional-radial acoustic modes", Proc. SPIE 12643, European Workshop on Optical Fibre Sensors (EWOFS 2023), 1264306 (23 May 2023); https://doi.org/10.1117/12.2680762

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