Lifetime of thermally fixed holograms in LiNbO3 crystals doped with Mg and Fe

被引：0
|
作者：
L. Arizmendi
F.J. López-Barberá
机构：
[1] Universidad Autónoma de Madrid,Department of Materials Physics
来源：
Applied Physics B | 2007年 / 86卷
关键词：
Hydrogen Concentration; Lithium Niobate; Refractive Index Change; Lithium Niobate Crystal; Hydrogen Impurity;
D O I：
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学科分类号：
摘要：
Decays of thermally fixed holograms in LiNbO3 crystals doped with 5.5 mol. % of Mg and 0.1 mol. % of Fe were measured at different temperatures. The analysis showed that the time decay is a thermally activated single process. The thermal activation energy depends on the Mg impurity and hydrogen concentration. Samples with moderate hydrogen concentration show an activation energy of 1.16 eV. Extrapolated room temperature hologram lifetimes as long as 540 years were determined. Samples with large amount of hydrogen impurity showed a lower activation energy and also lower room temperature lifetime.
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