Strongly sublinear growth of the photorefractive effect for increasing pump intensities in doped lithium-niobate crystals

被引：25
作者：
Minzioni, Paolo
Cristiani, Ilaria
Degiorgio, Vittorio
Kokanyan, Edvard P.
机构：
[1] Univ Pavia, CNISM, I-27100 Pavia, Italy
[2] Univ Pavia, Dept Elect, I-27100 Pavia, Italy
[3] Natl Acad Sci, Phys Res Inst, Ashtarak 378410 2, Armenia
来源：
JOURNAL OF APPLIED PHYSICS | 2007年 / 101卷 / 11期
关键词：
D O I：
10.1063/1.2739354
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The pump intensity dependence of the birefringence change due to the photorefractive effect in Hf-doped and Mg-doped congruent lithium niobate (LN) crystals is reported. The birefringence change is found to be very weakly dependent on the light intensity. This is in strong contrast with the behavior of undoped congruent LN, and much more similar to what happens in stoichiometric LN. The data also indicate that the minimum HfO2 concentration necessary to strongly reduce photorefractivity is lower than the value of 4 mol % indicated by previous experiments. (c) 2007 American Institute of Physics.
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