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Strong refractive index changes induced in Ag ion exchanged Er doped phosphate glass using 248 nm excimer laser radiation

Strong refractive index changes induced in Ag ion exchanged Er doped phosphate glass using 248 nm excimer laser radiation
Strong refractive index changes induced in Ag ion exchanged Er doped phosphate glass using 248 nm excimer laser radiation
The photosensitivity of a commercial phosphate glass (Schott IOG-I), which is doped with Er3+ ions and has been ion exchanged with Ag+ ions, was examined using nanosecond 248 nm excimer laser radiation. Grating structures were inscribed in the untreated and ion exchanged Er doped IOG-l glass by employing phase mask interference in contact mode. The dependence of ultraviolet induced refractive index changes upon the ion exchanged Ag+ concentration and the number of ultraviolet pulses was studied using diffraction efficiency measurements. Refractive index changes in untreated glasses are of the order of 10-5, whereas for silver ion exchanged samples they reach ~2.0 x 10-3, for ultraviolet exposures of 30000 pulses of 400mJ/cm2 energy density. Measurements of the absorption spectra of exposed and unexposed samples were carried out in order to reveal absorption bands and illustrate photosensitivity mechanisms. Furthermore, energy dispersive spectrum microanalysis and scanning electron microscopy of the exposed ion exchanged glass samples reveal that ultraviolet radiation induces migration of the Ag+ ions towards the areas of high energy density.
0017-1050
76-79
Pissadakis, S.
a91c54e0-3b8d-479f-b44e-e678bc34a277
Ikiades, A.
6b4f12e0-7ded-43fb-8a61-e2b725f65cb3
Hua, Ping
92fa76e2-970b-45f5-a459-d9f95e735303
Sheridan, A.K.
3744de9e-5516-4842-bb36-852702ded40a
Wilkinson, J.S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Pissadakis, S.
a91c54e0-3b8d-479f-b44e-e678bc34a277
Ikiades, A.
6b4f12e0-7ded-43fb-8a61-e2b725f65cb3
Hua, Ping
92fa76e2-970b-45f5-a459-d9f95e735303
Sheridan, A.K.
3744de9e-5516-4842-bb36-852702ded40a
Wilkinson, J.S.
73483cf3-d9f2-4688-9b09-1c84257884ca

Pissadakis, S., Ikiades, A., Hua, Ping, Sheridan, A.K. and Wilkinson, J.S. (2005) Strong refractive index changes induced in Ag ion exchanged Er doped phosphate glass using 248 nm excimer laser radiation. Glass Technology, 46 (2), 76-79.

Record type: Article

Abstract

The photosensitivity of a commercial phosphate glass (Schott IOG-I), which is doped with Er3+ ions and has been ion exchanged with Ag+ ions, was examined using nanosecond 248 nm excimer laser radiation. Grating structures were inscribed in the untreated and ion exchanged Er doped IOG-l glass by employing phase mask interference in contact mode. The dependence of ultraviolet induced refractive index changes upon the ion exchanged Ag+ concentration and the number of ultraviolet pulses was studied using diffraction efficiency measurements. Refractive index changes in untreated glasses are of the order of 10-5, whereas for silver ion exchanged samples they reach ~2.0 x 10-3, for ultraviolet exposures of 30000 pulses of 400mJ/cm2 energy density. Measurements of the absorption spectra of exposed and unexposed samples were carried out in order to reveal absorption bands and illustrate photosensitivity mechanisms. Furthermore, energy dispersive spectrum microanalysis and scanning electron microscopy of the exposed ion exchanged glass samples reveal that ultraviolet radiation induces migration of the Ag+ ions towards the areas of high energy density.

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Published date: April 2005

Identifiers

Local EPrints ID: 47849
URI: https://eprints.soton.ac.uk/id/eprint/47849
ISSN: 0017-1050
PURE UUID: fbc2c8a6-f400-4e47-87b0-e3c1d115578e
ORCID for J.S. Wilkinson: ORCID iD orcid.org/0000-0003-4712-1697

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Date deposited: 10 Aug 2007
Last modified: 19 Jul 2019 18:49

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