Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5402258 | Journal of Luminescence | 2010 | 6 Pages |
Abstract
The intensity of erbium up-conversion luminescence could be limited by a saturation effect due to increased pump power. We studied the luminescence saturation of the 550Â nm emission on erbium-doped, SiO2-TiO2 sol-gel powders under pulsed excitation at 979 and 1532Â nm. From the latter, the up-converted luminescence intensity decreased with increasing excitation power, whereas no saturation was observed at 979Â nm excitation. We proposed that the saturation effect is determined by the pump power, the erbium content and the lifetime of the corresponding first excited states at different pumping schemes.
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Authors
J. Castañeda-Contreras, M.A. Meneses-Nava, O. Barbosa-GarcÃa, R. Chiu-Zárate, M.V. Félix, R. Rodriguez,