We have investigated the Raman activity of various germanosilicate fibers and their associated preforms. Our data indicate an enhancement in small rings' (3-member rings) concentration in the silica-based matrix of the fibers during the drawing process. The generation of such rings appears compatible with an increase of the sample density and fictive temperature. The data regarding the drawing effects on the fiber stress appear less clear, and it is possible to suggest that in some cases the drawing could lower the tensile stress. Finally we have also provided evidence that changing the drawing conditions within the usual range of application leads to no significant changes of the matrix structure as can be observed using Raman spectroscopy.
Alessi, A., Girard, S., Marcandella, C., Cannas, M., Boukenter, A., Ouerdane, Y. (2011). Raman investigation of the drawing effects on Ge-doped fibers. JOURNAL OF NON-CRYSTALLINE SOLIDS, 357, 24-27 [10.1016/j.jnoncrysol.2010.09.080].
Raman investigation of the drawing effects on Ge-doped fibers
ALESSI, Antonino;CANNAS, Marco;
2011-01-01
Abstract
We have investigated the Raman activity of various germanosilicate fibers and their associated preforms. Our data indicate an enhancement in small rings' (3-member rings) concentration in the silica-based matrix of the fibers during the drawing process. The generation of such rings appears compatible with an increase of the sample density and fictive temperature. The data regarding the drawing effects on the fiber stress appear less clear, and it is possible to suggest that in some cases the drawing could lower the tensile stress. Finally we have also provided evidence that changing the drawing conditions within the usual range of application leads to no significant changes of the matrix structure as can be observed using Raman spectroscopy.File | Dimensione | Formato | |
---|---|---|---|
1-s2.0-S002230931000743X-main.pdf
Solo gestori archvio
Descrizione: pdf
Dimensione
520.39 kB
Formato
Adobe PDF
|
520.39 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.