MicroRaman and photorefractivity study of hafnium-doped lithium niobate crystals

被引：9
|
作者：
Galinetto, P
Rossella, F
Minzioni, P
Razzari, L
Cristiani, I
Degiorgio, V
Kokanyan, EP
机构：
[1] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy
[2] Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy
[3] Armenian Acad Sci, Inst Phys Res, Ashtarak 378410, Armenia
来源：
JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS | 2006年 / 15卷 / 01期
关键词：
ferroelectric crystals; photorefractivity; microRaman spectroscopy; lithium niobate; wavelength conversion;
D O I：
10.1142/S021886350600313X
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present an investigation of the properties of HfO2-doped lithium niobate crystals, in view of their possible utilization as low-photorefractivity crystals for wavelength converters operating at room temperature. MicroRaman measurements indicate that the linewidth of a specific mode can be used as a local indicator of crystal composition, and show that the grown crystals present very good uniformity. The mechanism by which the photorefractivity is strongly reduced when the HfO2 concentration is above 4 mol% is studied by combining measurements of birefringence variation, under green-light illumination, with electrical phototransport data.
引用
收藏
页码：9 / 21
页数：13
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