Effects of curvature on flexible Bragg grating in off-axis core: theory and experiment
Effects of curvature on flexible Bragg grating in off-axis core: theory and experiment
A high curvature flexible Bragg grating, in planar technology, is designed, fabricated and experimentally characterized by employing silica glass. The curvature sensing mechanism for slightly off-axis core is theoretically explained and experimentally demonstrated. The electromagnetic behavior of the proposed sensor is investigated through conformal mapping, modal analysis, and coupled-mode theory. The experimental measurement reveals different sensitivities to positive and negative curvatures. The reflection spectrum of the planar Bragg grating sensor and the relationship between its resonant wavelengths and the curvature is measured for a large curvature range up to 1/R = ± 33m-1. The interest toward off-axis core on planar flexible platform for curvature monitoring is due to the lateral stiffness and low Young's modulus of the substrate.
Bragg sensor, curvature, electromagnetic analysis, gratings, optical fiber devices
2904-2910
Anelli, Francesco
5da88525-6c26-41eb-b9b6-04b561cad8bc
Annunziato, Andrea
b6a9b6d6-fb20-4b5e-bf50-fb0c297b8fbc
Godfrey, Mike
64cac3da-67a6-4ab1-82de-233cc6e47ce9
Loconsole, Antonella Maria
b6635b7f-491c-4e44-9676-663aeb836852
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Prudenzano, Francesco
a650c97a-97ca-4791-b93f-dbd9ac693048
1 May 2023
Anelli, Francesco
5da88525-6c26-41eb-b9b6-04b561cad8bc
Annunziato, Andrea
b6a9b6d6-fb20-4b5e-bf50-fb0c297b8fbc
Godfrey, Mike
64cac3da-67a6-4ab1-82de-233cc6e47ce9
Loconsole, Antonella Maria
b6635b7f-491c-4e44-9676-663aeb836852
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Prudenzano, Francesco
a650c97a-97ca-4791-b93f-dbd9ac693048
Anelli, Francesco, Annunziato, Andrea, Godfrey, Mike, Loconsole, Antonella Maria, Holmes, Christopher and Prudenzano, Francesco
(2023)
Effects of curvature on flexible Bragg grating in off-axis core: theory and experiment.
Journal of Lightwave Technology, 41 (9), .
(doi:10.1109/JLT.2023.3238427).
Abstract
A high curvature flexible Bragg grating, in planar technology, is designed, fabricated and experimentally characterized by employing silica glass. The curvature sensing mechanism for slightly off-axis core is theoretically explained and experimentally demonstrated. The electromagnetic behavior of the proposed sensor is investigated through conformal mapping, modal analysis, and coupled-mode theory. The experimental measurement reveals different sensitivities to positive and negative curvatures. The reflection spectrum of the planar Bragg grating sensor and the relationship between its resonant wavelengths and the curvature is measured for a large curvature range up to 1/R = ± 33m-1. The interest toward off-axis core on planar flexible platform for curvature monitoring is due to the lateral stiffness and low Young's modulus of the substrate.
Text
Effects_of_Curvature_on_Flexible_Bragg_Grating_in_Off-Axis_Core_Theory_and_Experiment
- Version of Record
More information
e-pub ahead of print date: 20 January 2023
Published date: 1 May 2023
Keywords:
Bragg sensor, curvature, electromagnetic analysis, gratings, optical fiber devices
Identifiers
Local EPrints ID: 499647
URI: http://eprints.soton.ac.uk/id/eprint/499647
ISSN: 0733-8724
PURE UUID: 06efe1c3-7b4f-4cd6-932d-256cd90af28b
Catalogue record
Date deposited: 28 Mar 2025 17:42
Last modified: 22 Aug 2025 01:56
Export record
Altmetrics
Contributors
Author:
Francesco Anelli
Author:
Andrea Annunziato
Author:
Mike Godfrey
Author:
Antonella Maria Loconsole
Author:
Francesco Prudenzano
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics