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Proceedings Paper

Hydroxy groups in high-purity glasses for fiber optics III: germanosilicate glasses
Author(s): Victor G. Plotnichenko; V. O. Sokolov; Eugeni M. Dianov
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Paper Abstract

We have investigated absorption band corresponding to the principal stretching vibration of hydroxyl (OH) groups in (GeO2)x(SiO2)1-x glasses with x <EQ 25 mol.% made by VAD and MCVD methods and by melting of GeO2 and SiO2 powders. The literature data have been analyzed and quantum-chemical calculations of various possible ways of OH groups embedded in the germanosilicate glass atomic network have been performed. OH groups are shown to occur in the investigated specimens mainly as silanol groups, equalsV Si-OH, concentration of equalsV Ge-OH groups being less than 5%. The maximum at 3600 cm-1 of OH absorption band in germanosilicate glass usually ascribed to equalsV Ge-OH groups is supposed to be caused by equalsV Si-OH groups hydrogen-bonded with equalsV Ge-O-GeequalsV linkages and, probably, with equalsVSi-O-GeequalsV linkages. The apparent discrepancy of data for various specimens of germanosilicate glasses are explained by assumption that different conditions of manufacturing yield different degree of homogeneity of glass specimens. The shape and position of the absorption bands of OH stretching vibration in GeO2- SiO2 glasses are proposed as an additional criterion in homogeneity of glass and for technological control.

Paper Details

Date Published: 17 May 2000
PDF: 12 pages
Proc. SPIE 4083, Advances in Fiber Optics, (17 May 2000); doi: 10.1117/12.385655
Show Author Affiliations
Victor G. Plotnichenko, General Physics Institute (Russia)
V. O. Sokolov, General Physics Institute (Russia)
Eugeni M. Dianov, General Physics Institute (Russia)

Published in SPIE Proceedings Vol. 4083:
Advances in Fiber Optics
Eugeni M. Dianov, Editor(s)

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