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A novel technique for enhancing the photosensitivity of germanosilicate waveguides

A novel technique for enhancing the photosensitivity of germanosilicate waveguides
A novel technique for enhancing the photosensitivity of germanosilicate waveguides
Thermal treatment of GeO2:SiO2 waveguides, achieved by exposing the waveguides to CO2 laser radiation before grating writing, increases the UV photosensitivity of optical fibres. Gratings written in treated fibres show a refractive index modulation two times greater and a Bragg wavelength shift 2 nm larger than those written in untreated fibres. The thermal treatment carried out on bulk samples showed a pronounced increase of the 242nm absorption band, thus indicating that the increase of germanium oxygen deficient centres (GODC) is believed to be responsible for the higher photosensitivity.
Brambilla, G.
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Pruneri, V.
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Reekie, L.
ec314137-6924-44ad-86a4-ff3f9a67c1b5
Payne, D.N.
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Brambilla, G.
815d9712-62c7-47d1-8860-9451a363a6c8
Pruneri, V.
0e97eb94-b682-409f-a107-ae6b84763f02
Reekie, L.
ec314137-6924-44ad-86a4-ff3f9a67c1b5
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d

Brambilla, G., Pruneri, V., Reekie, L. and Payne, D.N. (1999) A novel technique for enhancing the photosensitivity of germanosilicate waveguides. IEE Colloquium on Optical Fibre Gratings, United Kingdom.

Record type: Conference or Workshop Item (Paper)

Abstract

Thermal treatment of GeO2:SiO2 waveguides, achieved by exposing the waveguides to CO2 laser radiation before grating writing, increases the UV photosensitivity of optical fibres. Gratings written in treated fibres show a refractive index modulation two times greater and a Bragg wavelength shift 2 nm larger than those written in untreated fibres. The thermal treatment carried out on bulk samples showed a pronounced increase of the 242nm absorption band, thus indicating that the increase of germanium oxygen deficient centres (GODC) is believed to be responsible for the higher photosensitivity.

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Published date: 26 March 1999
Venue - Dates: IEE Colloquium on Optical Fibre Gratings, United Kingdom, 1999-03-26

Identifiers

Local EPrints ID: 76549
URI: http://eprints.soton.ac.uk/id/eprint/76549
PURE UUID: bf86cac1-acaf-4560-a8d2-2494d727e48d

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Date deposited: 11 Mar 2010
Last modified: 19 Jul 2019 23:38

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