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UV-induced reaction of H2 with germanosilicate and aluminosilicate glasses

UV-induced reaction of H2 with germanosilicate and aluminosilicate glasses
UV-induced reaction of H2 with germanosilicate and aluminosilicate glasses
The cores of optical fiber preforms were exposed to UV light at 244 nm after molecular hydrogen loading under high pressure. The reactions between hydrogen and the core material were investigated by Fourier transform infrared spectroscopy in the 3 mm spectral range. Various glass compositions were considered: germanosilicate glasses codoped with B, Sn, or not and aluminosilicate glasses codoped with Ce or Tb. In germanosilicate glasses (codoped or not), H2 reacts at the Ge sites only. The major defect formed is Ge-OH, some Ge-H is detected too, but at a much smaller level. In the Ce-doped aluminosilicate plates, H2 reacts with Ce and forms Ce-OH. All these materials are reduced through the UV light exposure as shown by the presence of molecular water formed by reaction of H2 with the glass network. The exceptions are with the Tb aluminosilicate preforms which show no reaction with H2 under UV exposure.
0022-3093
277-282
Cordier, P.
3d659481-4853-4deb-bde9-8cac55f193f1
Dalle, C.
4d3a911d-1965-46f5-ab5c-04fc61849916
Depecker, C.
13f53a75-70e3-4fe6-a9d8-aee886a11d8e
Bernage, P.
a4563602-a9fe-4568-8091-83515ef30381
Douay, M.
d75552e1-c8c1-4593-9715-8f56cf8f9e14
Niay, P.
f64f7917-2ea5-4572-bd07-ca442803e602
Bayon, J.F.
a9c6c830-18a5-45ac-9075-5d5fe3f5d9e0
Dong, L.N.
8710a625-dbe2-4a97-afb4-1a47ea8b16c3
Cordier, P.
3d659481-4853-4deb-bde9-8cac55f193f1
Dalle, C.
4d3a911d-1965-46f5-ab5c-04fc61849916
Depecker, C.
13f53a75-70e3-4fe6-a9d8-aee886a11d8e
Bernage, P.
a4563602-a9fe-4568-8091-83515ef30381
Douay, M.
d75552e1-c8c1-4593-9715-8f56cf8f9e14
Niay, P.
f64f7917-2ea5-4572-bd07-ca442803e602
Bayon, J.F.
a9c6c830-18a5-45ac-9075-5d5fe3f5d9e0
Dong, L.N.
8710a625-dbe2-4a97-afb4-1a47ea8b16c3

Cordier, P., Dalle, C., Depecker, C., Bernage, P., Douay, M., Niay, P., Bayon, J.F. and Dong, L.N. (1998) UV-induced reaction of H2 with germanosilicate and aluminosilicate glasses. Journal of Non-Crystalline Solids, 224 (3), 277-282. (doi:10.1016/S0022-3093(97)00470-5).

Record type: Article

Abstract

The cores of optical fiber preforms were exposed to UV light at 244 nm after molecular hydrogen loading under high pressure. The reactions between hydrogen and the core material were investigated by Fourier transform infrared spectroscopy in the 3 mm spectral range. Various glass compositions were considered: germanosilicate glasses codoped with B, Sn, or not and aluminosilicate glasses codoped with Ce or Tb. In germanosilicate glasses (codoped or not), H2 reacts at the Ge sites only. The major defect formed is Ge-OH, some Ge-H is detected too, but at a much smaller level. In the Ce-doped aluminosilicate plates, H2 reacts with Ce and forms Ce-OH. All these materials are reduced through the UV light exposure as shown by the presence of molecular water formed by reaction of H2 with the glass network. The exceptions are with the Tb aluminosilicate preforms which show no reaction with H2 under UV exposure.

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Published date: April 1998

Identifiers

Local EPrints ID: 77883
URI: https://eprints.soton.ac.uk/id/eprint/77883
ISSN: 0022-3093
PURE UUID: c166cdaa-3d74-40e0-87e3-ec9d9579e381

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Date deposited: 11 Mar 2010
Last modified: 17 Jul 2019 00:13

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