Flat multi-core fibre for twist elimination in distributed curvature sensing

Zafeiropoulou, Angeliki, Masoudi, Ali, Cooper, Laurence James and Brambilla, Gilberto (2021) Flat multi-core fibre for twist elimination in distributed curvature sensing. Optical Fiber Technology, 66, [102663]. (doi:10.1016/j.yofte.2021.102663).

Record type: Article

Abstract

Optical fibre sensors offer many advantages in comparison to their conventional counterparts, such as extremely low sensitivity to external electro-magnetic fields and small dimensions. The multi-core fibres in particular are ideal candidates for shape sensing due to the intrinsic 3D coordinate system they offer. However the twist of the multi-core fibre during its deployment along the structure of interest, distorts the 3D coordinate system based on their fixed position. In this work a multi-core fibre of unique geometry is presented as a solution to this issue. Owing to its two flat sides, this fibre presents enhanced preferential bending that eliminates the random twist of the sensing fibre.

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Accepted/In Press date: 1 October 2021

Published date: October 2021

Additional Information: Funding Information: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement FINESSE No 722509, from UKRI under grants EP/S013776; NE/S012877/1, and from the Royal Society under the grant CHL\R1 \180350.

Keywords: B-OTDR, Brillouin, Distributed, Flat fibre, Multi-core, Optical fibre, Sensing, Shape sensing

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