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Combining physical micro-machining and direct UV writing to fabricate novel planar tilted Bragg grating refractometers

Combining physical micro-machining and direct UV writing to fabricate novel planar tilted Bragg grating refractometers
Combining physical micro-machining and direct UV writing to fabricate novel planar tilted Bragg grating refractometers
Tilted Bragg gratings (TBG) offer discrimination between different environmental perturbations, such as localised strain (including thermal expansion) and external refractive index [1]. Discrimination can usually be made in this way as the external refractive index is not in direct contact with the core mode. Such technology has been primarily exploited in optical fibre [1-3], with some recent progress demonstrating multiplexed multi-point sensing networks [2], and the employment of enhancement layers to increase external refractive index resolution [3]. Despite significant developments made in fibre, relatively few reports have been made for such components in a planar geometry, which have the added advantage of compact integration and offers ready integration with microfluidics. A recent patent application for a refractometer device [4], has proposed the use of planar tilted Bragg gratings (PTBG) but it only describes geometries in which the measurand is in direct contact with the core of the waveguide. This work details a novel PTBG structure whose core mode is not in contact with the external refractive index.
Holmes, C.
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Carpenter, L.
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Gates, J.C.
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Sparrow, I.J.G.
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Smith, P.G.R.
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Holmes, C.
16306bb8-8a46-4fd7-bb19-a146758e5263
Carpenter, L.
0daa548e-0d42-4b06-b914-45bfbec41759
Gates, J.C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Sparrow, I.J.G.
3b11b080-98d5-41fe-8e15-bc12d17dc259
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6

Holmes, C., Carpenter, L., Gates, J.C., Sparrow, I.J.G. and Smith, P.G.R. (2011) Combining physical micro-machining and direct UV writing to fabricate novel planar tilted Bragg grating refractometers. CLEO/EQEC 2011: Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, Germany. 22 - 26 May 2011.

Record type: Conference or Workshop Item (Paper)

Abstract

Tilted Bragg gratings (TBG) offer discrimination between different environmental perturbations, such as localised strain (including thermal expansion) and external refractive index [1]. Discrimination can usually be made in this way as the external refractive index is not in direct contact with the core mode. Such technology has been primarily exploited in optical fibre [1-3], with some recent progress demonstrating multiplexed multi-point sensing networks [2], and the employment of enhancement layers to increase external refractive index resolution [3]. Despite significant developments made in fibre, relatively few reports have been made for such components in a planar geometry, which have the added advantage of compact integration and offers ready integration with microfluidics. A recent patent application for a refractometer device [4], has proposed the use of planar tilted Bragg gratings (PTBG) but it only describes geometries in which the measurand is in direct contact with the core of the waveguide. This work details a novel PTBG structure whose core mode is not in contact with the external refractive index.

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More information

e-pub ahead of print date: 2011
Venue - Dates: CLEO/EQEC 2011: Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, Germany, 2011-05-22 - 2011-05-26
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 343029
URI: https://eprints.soton.ac.uk/id/eprint/343029
PURE UUID: f2fd93f7-5838-46cd-833e-568b804c431a
ORCID for C. Holmes: ORCID iD orcid.org/0000-0001-9021-3760
ORCID for J.C. Gates: ORCID iD orcid.org/0000-0001-8671-5987
ORCID for P.G.R. Smith: ORCID iD orcid.org/0000-0003-0319-718X

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Date deposited: 20 Sep 2012 15:48
Last modified: 17 Oct 2019 00:38

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