Title :
Influence of Ge concentration on UV-excited luminescence in a graded-index fibre preform
Author :
Thibault, Samuel ; Lauzon, Jocelyn ; Ouellette, F.
Author_Institution :
Dept. de Genie Electr., Laval Univ., Que.
fDate :
3/17/1994 12:00:00 AM
Abstract :
A germanosilicate glass graded-index fibre preform thin sample was submitted to a wide range of 266 nm excitation powers across its core. The resulting 400 nm luminescence signal was found to follow the index profile of the preform at low excitation power and to be bleached at higher power above a certain Ge-concentration threshold. This threshold changed to lower Ge-concentration values with higher excitation power
Keywords :
germanate glasses; germanium compounds; gradient index optics; luminescence of inorganic solids; optical fibres; optical saturable absorption; photoluminescence; refractive index; silicon compounds; 266 nm; 400 nm; Ge-concentration threshold; GeO2-SiO2; UV-excited luminescence; excitation powers; germanosilicate glass; graded-index fibre preform; index profile; photobleaching;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19940353
