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New geometry for planar UV written refractive index sensors

New geometry for planar UV written refractive index sensors
New geometry for planar UV written refractive index sensors
We shall present some of our recent results from our work on UV written planar waveguide refractive index sensors. Refractive index of an analyte is measured through the perturbation of an optical mode, interrogation of the modal index is achieved via the reflected spectra from a Bragg grating defined in the same process as the channel waveguide. Here we introduce a new geometry which embraces the benefits of planar technology to realise new integrated devices. The geometry allows several different sensors to be defined on the same substrate each offering complementary information. Such information may include index as a function of penetration depth for surface binding analytes, interrogation wavelength for dispersion analysis, enhanced sensitivity in specific index ranges and temperature compensation. We shall also outline the inherent fabrication advantages and device feature benefits, including a reduction in return loss, spectral artefacts and a suggested reduction in stress induced birefringence. The silica sensing surface opposed to gold used in SPR devices opens new avenues to exploit surface binding. With a marked reduction in complexity and cost these devices may have significant impact in future sensor markets.
direct uv writing, refractive index sensor, planar bragg grating
Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Adikan, Rafiq M.F.
a1ca9e88-45f5-47b1-9379-7218b3c39e05
Gawith, Corin B.E.
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Adikan, Rafiq M.F.
a1ca9e88-45f5-47b1-9379-7218b3c39e05
Gawith, Corin B.E.
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6

Gates, James C., Holmes, Christopher, Adikan, Rafiq M.F., Gawith, Corin B.E. and Smith, Peter G.R. (2007) New geometry for planar UV written refractive index sensors. SPIE Europe Optical Sensing Technology and Applications. 16 - 20 Apr 2007. 1 pp . (doi:10.1117/12.722871).

Record type: Conference or Workshop Item (Paper)

Abstract

We shall present some of our recent results from our work on UV written planar waveguide refractive index sensors. Refractive index of an analyte is measured through the perturbation of an optical mode, interrogation of the modal index is achieved via the reflected spectra from a Bragg grating defined in the same process as the channel waveguide. Here we introduce a new geometry which embraces the benefits of planar technology to realise new integrated devices. The geometry allows several different sensors to be defined on the same substrate each offering complementary information. Such information may include index as a function of penetration depth for surface binding analytes, interrogation wavelength for dispersion analysis, enhanced sensitivity in specific index ranges and temperature compensation. We shall also outline the inherent fabrication advantages and device feature benefits, including a reduction in return loss, spectral artefacts and a suggested reduction in stress induced birefringence. The silica sensing surface opposed to gold used in SPR devices opens new avenues to exploit surface binding. With a marked reduction in complexity and cost these devices may have significant impact in future sensor markets.

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Published date: 2007
Additional Information: Conference code: COO105
Venue - Dates: SPIE Europe Optical Sensing Technology and Applications, 2007-04-16 - 2007-04-20
Keywords: direct uv writing, refractive index sensor, planar bragg grating

Identifiers

Local EPrints ID: 46134
URI: https://eprints.soton.ac.uk/id/eprint/46134
PURE UUID: 1b8cae34-438a-4fe9-a25e-8b7f5d1b4f67
ORCID for James C. Gates: ORCID iD orcid.org/0000-0001-8671-5987
ORCID for Corin B.E. Gawith: ORCID iD orcid.org/0000-0002-3502-3558

Catalogue record

Date deposited: 24 May 2007
Last modified: 15 Aug 2019 00:49

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Contributors

Author: James C. Gates ORCID iD
Author: Rafiq M.F. Adikan

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