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Two-dimensional vector bending sensor based on Fabry-Pérot cavities in a multicore fiber

Oliveira, R. ; Cardoso, M. ; Rocha, Ana M.

Optics Express Vol. 30, Nº 2, pp. 2230 - 2230, January, 2022.

ISSN (print): 1094-4087
ISSN (online):

Scimago Journal Ranking: 1,23 (in 2021)

Digital Object Identifier: 10.1364/OE.445396

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In this work we demonstrate the fabrication and characterization of a temperature insensitive, two-dimensional curvature sensor using a resin based Fabry-Pérot interferometer, constructed using a multicore fiber (MCF). The fabrication simplicity makes this fiber device very attractive compared to the already reported technologies. Furthermore, the sensitivity reached (>400 pm/m-1), 7 times higher than the one reported for fiber Bragg gratings written on a similar MCF. The reconstruction of the amplitude and curvature has been performed for, showing errors lower than 4%. A numerical study has also been developed, allowing us to understand the sensor response at different fiber sensor geometries.