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Design of microstructured flat optical fiber for multiaxial strain monitoring in composite materials

Design of microstructured flat optical fiber for multiaxial strain monitoring in composite materials
Design of microstructured flat optical fiber for multiaxial strain monitoring in composite materials

An innovative microstructured flat optical fiber is designed to obtain a multiaxial strain sensor for composite material monitoring. The sensing regions are constituted by the two eyelets where Bragg gratings are written. To achieve multiaxial sensing, a suitable microstructure is designed close to only one of the eyelets. The effect of the strain field, evaluated via a 3D finite element method approach, is considered to obtain the change of the refractive index distribution. The electromagnetic modal analysis and the coupled mode theory are exploited to evaluate the Bragg wavelength shift for the slow and fast axis fundamental modes, guided in the two eyelets and affecting the sensor response. The designed microstructured flat optical fiber is technologically feasible and promises sensing performance higher than that obtainable with the conventional optical fibers. In addition, flat optical fiber can be embedded in composite materials reducing the drawbacks related to both orientation and excess resin.

Electromagnetic analysis, gratings, modeling, optical fiber devices, strain control
0733-8724
5986-5994
Anelli, Francesco
5da88525-6c26-41eb-b9b6-04b561cad8bc
Annunziato, Andrea
e6e33703-92b1-4cf0-9b9f-5e577feb0edc
Erario, Alessia
4240f19f-3b45-461a-bed6-3a48dea03c56
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Ciminelli, Caterina
1d874695-abf6-4d23-ae15-8c0c90849d72
Prudenzano, Francesco
a650c97a-97ca-4791-b93f-dbd9ac693048
Anelli, Francesco
5da88525-6c26-41eb-b9b6-04b561cad8bc
Annunziato, Andrea
e6e33703-92b1-4cf0-9b9f-5e577feb0edc
Erario, Alessia
4240f19f-3b45-461a-bed6-3a48dea03c56
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Ciminelli, Caterina
1d874695-abf6-4d23-ae15-8c0c90849d72
Prudenzano, Francesco
a650c97a-97ca-4791-b93f-dbd9ac693048

Anelli, Francesco, Annunziato, Andrea, Erario, Alessia, Holmes, Christopher, Ciminelli, Caterina and Prudenzano, Francesco (2022) Design of microstructured flat optical fiber for multiaxial strain monitoring in composite materials. Journal of Lightwave Technology, 40 (17), 5986-5994. (doi:10.1109/JLT.2022.3186912).

Record type: Article

Abstract

An innovative microstructured flat optical fiber is designed to obtain a multiaxial strain sensor for composite material monitoring. The sensing regions are constituted by the two eyelets where Bragg gratings are written. To achieve multiaxial sensing, a suitable microstructure is designed close to only one of the eyelets. The effect of the strain field, evaluated via a 3D finite element method approach, is considered to obtain the change of the refractive index distribution. The electromagnetic modal analysis and the coupled mode theory are exploited to evaluate the Bragg wavelength shift for the slow and fast axis fundamental modes, guided in the two eyelets and affecting the sensor response. The designed microstructured flat optical fiber is technologically feasible and promises sensing performance higher than that obtainable with the conventional optical fibers. In addition, flat optical fiber can be embedded in composite materials reducing the drawbacks related to both orientation and excess resin.

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Accepted/In Press date: 23 June 2022
e-pub ahead of print date: 28 June 2022
Published date: 2 September 2022
Keywords: Electromagnetic analysis, gratings, modeling, optical fiber devices, strain control

Identifiers

Local EPrints ID: 473325
URI: http://eprints.soton.ac.uk/id/eprint/473325
ISSN: 0733-8724
PURE UUID: 48349f3e-44c6-427f-b16b-89afa76d5d88
ORCID for Christopher Holmes: ORCID iD orcid.org/0000-0001-9021-3760

Catalogue record

Date deposited: 16 Jan 2023 17:31
Last modified: 31 Oct 2023 02:45

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Contributors

Author: Francesco Anelli
Author: Andrea Annunziato
Author: Alessia Erario
Author: Christopher Holmes ORCID iD
Author: Caterina Ciminelli
Author: Francesco Prudenzano

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