Flexible photonics in low stiffness doped silica for use in fibre reinforced polymer composite materials
Flexible photonics in low stiffness doped silica for use in fibre reinforced polymer composite materials
The production of a flexible photonic device in doped silica with a Young’s modulus that is significantly less than that of traditional silica glass is described. Here the purpose of reducing the modulus is to make planar sensors more applicable for integration into fibre reinforced polymer composite structures. The flexible planar substrate (58 µm thick) consists of three doped silica layers, fabricated using sacrificial silicon wafer processing. It is demonstrated that a Young’s modulus of around 40 GPa can be achieved in comparison to a value above 70 GPa for typical silica glass. The optical response of a few mode waveguide that is direct UV written within the central core layer of the flexible glass platform is described. The mechanical stiffness of the platform is determined using nano-indentation tests and confirmed in mechanical tests that demonstrate clearly the flexible nature of the platform. To assess usability for applications integrated into structures undergoing mechanical loading the fatigue lifetime for one million bending cycles is investigated. No degradation to the optical response was observed under the performed testing.
Advanced Composites, Flame Hydrolysis Deposition, Flexible Photonics, Planar Optics, Silica
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Godfrey, M.
64cac3da-67a6-4ab1-82de-233cc6e47ce9
Mennea, Paolo
d994ba05-bcc1-4be3-8ba1-439fb1535a3f
Zahertar, Shahrzad
9e9db9c7-0e1e-4d50-99b8-af23e09ab6ae
Barton, Janice
9e35bebb-2185-4d16-a1bc-bb8f20e06632
1 December 2022
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Godfrey, M.
64cac3da-67a6-4ab1-82de-233cc6e47ce9
Mennea, Paolo
d994ba05-bcc1-4be3-8ba1-439fb1535a3f
Zahertar, Shahrzad
9e9db9c7-0e1e-4d50-99b8-af23e09ab6ae
Barton, Janice
9e35bebb-2185-4d16-a1bc-bb8f20e06632
Holmes, Christopher, Godfrey, M., Mennea, Paolo, Zahertar, Shahrzad and Barton, Janice
(2022)
Flexible photonics in low stiffness doped silica for use in fibre reinforced polymer composite materials.
Optical Materials, 134, [113133].
(doi:10.1016/j.optmat.2022.113133).
Abstract
The production of a flexible photonic device in doped silica with a Young’s modulus that is significantly less than that of traditional silica glass is described. Here the purpose of reducing the modulus is to make planar sensors more applicable for integration into fibre reinforced polymer composite structures. The flexible planar substrate (58 µm thick) consists of three doped silica layers, fabricated using sacrificial silicon wafer processing. It is demonstrated that a Young’s modulus of around 40 GPa can be achieved in comparison to a value above 70 GPa for typical silica glass. The optical response of a few mode waveguide that is direct UV written within the central core layer of the flexible glass platform is described. The mechanical stiffness of the platform is determined using nano-indentation tests and confirmed in mechanical tests that demonstrate clearly the flexible nature of the platform. To assess usability for applications integrated into structures undergoing mechanical loading the fatigue lifetime for one million bending cycles is investigated. No degradation to the optical response was observed under the performed testing.
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Accepted/In Press date: 15 October 2022
e-pub ahead of print date: 5 November 2022
Published date: 1 December 2022
Additional Information:
Funding Information:
The authors would like to thank: Dr Richard Cook for his considerable help with the nanoindentation experiments; Prof Francesco Poletti, Dr Thomas Bradley, Mr Nicholas White and Mr Glenn Topley for assistance with flat fibre drawing. The research has been developed under EPSRC 'Roll-2-Roll (R2R) manufacture of multilayer planar optics', EP/V053213/1 and 'EPSRC Future Composites and Manufacturing Hub', EP/P006701/1. For the purpose of open access, the author has applied a creative commons attribution (CC BY) licence (where permitted by UKRI, ‘open government licence’ or ‘creative commons attribution no-derivatives (CC BY-ND) licence’ may be stated instead) to any author accepted manuscript version arising.
Publisher Copyright:
© 2022 The Authors
Keywords:
Advanced Composites, Flame Hydrolysis Deposition, Flexible Photonics, Planar Optics, Silica
Identifiers
Local EPrints ID: 470642
URI: http://eprints.soton.ac.uk/id/eprint/470642
ISSN: 0925-3467
PURE UUID: 699b82a7-955e-4392-8cb7-9eb404cfd5ca
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Date deposited: 17 Oct 2022 16:38
Last modified: 17 Mar 2024 04:08
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Author:
M. Godfrey
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