Colour centres in germanosilicate glass and optical fibres
- 29 August 1994
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 6 (35) , 6901-6936
- https://doi.org/10.1088/0953-8984/6/35/003
Abstract
This review presents the state of the art of the study of germanium-related colour centres in silica glass and silica-based fibres. Most attention is concentrated on the dominant colour centres such as the Ge-related oxygen-deficient centres and paramagnetic Ge(n) centres, all of them having ultraviolet absorption bands. The hypothetical models and formation mechanisms proposed so far for these colour centres are discussed in detail. The origins of the models and formation mechanisms and their weak and strong points are analysed. The origin of the less well studied Ge-related colour centres in the visible spectral range (GeH, GeX, drawing-dependent defects) is also discussed.Keywords
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