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Bend monitoring and refractive index sensing using flat fibre and multicore Bragg gratings

Bend monitoring and refractive index sensing using flat fibre and multicore Bragg gratings
Bend monitoring and refractive index sensing using flat fibre and multicore Bragg gratings

A planarized optical fibre designed for two-dimensional bend monitoring and external refractive index sensing is presented. The approach uses two single-mode waveguides each containing a set of spectrally multiplexed Bragg gratings. To achieve sensitivity to bending and external refractive index, the cladding material of the fibre is partially removed through physical machining. This acts to offset the neutral axis, increasing bend sensitivity, and exposes the evanescent field of the guided mode, permitting external refractive index monitoring. Through collective monitoring of the Bragg grating array, real time, multiparameter sensing is attainable, allowing new capability for intelligent monitoring.

0957-0233
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Ambran, Sumiaty
9dab29a4-1179-4e21-acf6-182c12d29998
Cooper, Peter
50a7bfaf-f22e-40a5-ba6c-a0bd6f385d80
Webb, Andrew
ec165a7d-68cb-4dc6-8382-b529e217c659
Gates, James
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Gawith, Corin
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Ambran, Sumiaty
9dab29a4-1179-4e21-acf6-182c12d29998
Cooper, Peter
50a7bfaf-f22e-40a5-ba6c-a0bd6f385d80
Webb, Andrew
ec165a7d-68cb-4dc6-8382-b529e217c659
Gates, James
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Gawith, Corin
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6

Holmes, Christopher, Ambran, Sumiaty, Cooper, Peter, Webb, Andrew, Gates, James, Gawith, Corin, Sahu, Jayanta and Smith, Peter G.R. (2020) Bend monitoring and refractive index sensing using flat fibre and multicore Bragg gratings. Measurement Science and Technology, 31 (8), [085203]. (doi:10.1088/1361-6501/ab8710).

Record type: Article

Abstract

A planarized optical fibre designed for two-dimensional bend monitoring and external refractive index sensing is presented. The approach uses two single-mode waveguides each containing a set of spectrally multiplexed Bragg gratings. To achieve sensitivity to bending and external refractive index, the cladding material of the fibre is partially removed through physical machining. This acts to offset the neutral axis, increasing bend sensitivity, and exposes the evanescent field of the guided mode, permitting external refractive index monitoring. Through collective monitoring of the Bragg grating array, real time, multiparameter sensing is attainable, allowing new capability for intelligent monitoring.

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More information

Accepted/In Press date: 6 April 2020
e-pub ahead of print date: 6 April 2020
Published date: August 2020

Identifiers

Local EPrints ID: 439493
URI: http://eprints.soton.ac.uk/id/eprint/439493
ISSN: 0957-0233
PURE UUID: ec410bf0-5a98-426e-ae75-81a340ff946d
ORCID for Christopher Holmes: ORCID iD orcid.org/0000-0001-9021-3760
ORCID for James Gates: ORCID iD orcid.org/0000-0001-8671-5987
ORCID for Corin Gawith: ORCID iD orcid.org/0000-0002-3502-3558
ORCID for Jayanta Sahu: ORCID iD orcid.org/0000-0003-3560-6152
ORCID for Peter G.R. Smith: ORCID iD orcid.org/0000-0003-0319-718X

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Date deposited: 24 Apr 2020 16:30
Last modified: 20 Feb 2021 02:40

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