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Integrated waveguides and Bragg gratings UV written with 213nm light

Integrated waveguides and Bragg gratings UV written with 213nm light
Integrated waveguides and Bragg gratings UV written with 213nm light
Direct UV writing is capable of fabricating low-loss channel waveguides, couplers and Bragg gratings in planar silica by translation through a focused UV beam. Devices are typically fabricated using 244nm laser light, relying on the photosensitivity provided by doping to induce sufficient refractive index change necessary to form waveguides. However, these devices also require hydrogen and deuterium loading prior to writing to induce sufficient refractive index change to form waveguides [1]. Hydrogenation not only requires additional processing but over time the hydrogen present within the silica depletes, which can cause variation of the final written structures. Deep UV light at 213 nm has previously been used to inscribe strong fibre Bragg gratings (FBGs) in hydrogen-free Ge-doped fibres achieving an index change of 1.2x10-3 [2]. Here we present the first use of a 213 nm UV laser to induce index change sufficient to simultaneously define waveguides and Bragg gratings in planar silica without hydrogenation. This would potentially allow writing of large area or two-dimensional devices without variation due to outgassing.
Gow, Paul C.
193394b1-fe2d-41de-a9aa-6de7e5925b18
Bannerman, Rex
7f7d5c3e-8e5d-45d5-8fd7-8d1511330e08
Gates, James
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Mennea, Paolo
d994ba05-bcc1-4be3-8ba1-439fb1535a3f
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Jantzen, Alexander
af05e45f-d153-4b8e-ae8b-6474fba5501a
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Gow, Paul C.
193394b1-fe2d-41de-a9aa-6de7e5925b18
Bannerman, Rex
7f7d5c3e-8e5d-45d5-8fd7-8d1511330e08
Gates, James
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Mennea, Paolo
d994ba05-bcc1-4be3-8ba1-439fb1535a3f
Holmes, Christopher
16306bb8-8a46-4fd7-bb19-a146758e5263
Jantzen, Alexander
af05e45f-d153-4b8e-ae8b-6474fba5501a
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6

Gow, Paul C., Bannerman, Rex, Gates, James, Mennea, Paolo, Holmes, Christopher, Jantzen, Alexander and Smith, Peter G.R. (2019) Integrated waveguides and Bragg gratings UV written with 213nm light. Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference 2019, Munich, Germany. 23 - 27 Jun 2019. 1 pp .

Record type: Conference or Workshop Item (Other)

Abstract

Direct UV writing is capable of fabricating low-loss channel waveguides, couplers and Bragg gratings in planar silica by translation through a focused UV beam. Devices are typically fabricated using 244nm laser light, relying on the photosensitivity provided by doping to induce sufficient refractive index change necessary to form waveguides. However, these devices also require hydrogen and deuterium loading prior to writing to induce sufficient refractive index change to form waveguides [1]. Hydrogenation not only requires additional processing but over time the hydrogen present within the silica depletes, which can cause variation of the final written structures. Deep UV light at 213 nm has previously been used to inscribe strong fibre Bragg gratings (FBGs) in hydrogen-free Ge-doped fibres achieving an index change of 1.2x10-3 [2]. Here we present the first use of a 213 nm UV laser to induce index change sufficient to simultaneously define waveguides and Bragg gratings in planar silica without hydrogenation. This would potentially allow writing of large area or two-dimensional devices without variation due to outgassing.

Text
213 UV writing submission V2 - Accepted Manuscript
Available under License Creative Commons Attribution.
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More information

Accepted/In Press date: 25 March 2019
Published date: 27 June 2019
Venue - Dates: Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference 2019, Munich, Germany, 2019-06-23 - 2019-06-27

Identifiers

Local EPrints ID: 429550
URI: https://eprints.soton.ac.uk/id/eprint/429550
PURE UUID: b86b567c-d342-481b-a0a8-c00ab7467c50
ORCID for Paul C. Gow: ORCID iD orcid.org/0000-0002-3247-9082
ORCID for James Gates: ORCID iD orcid.org/0000-0001-8671-5987

Catalogue record

Date deposited: 29 Mar 2019 17:30
Last modified: 28 Jun 2019 04:01

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