Reduced photorefraction in hafnium-doped single-domain and periodically poled lithium niobate crystals

被引:98
作者
Kokanyan, EP [1 ]
Razzari, L
Cristiani, I
Degiorgio, V
Gruber, JB
机构
[1] Natl Acad Sci Armenia, Inst Phys Res, Ashtarak 378410 2, Armenia
[2] INFM, I-27100 Pavia, Italy
[3] Univ Pavia, I-27100 Pavia, Italy
[4] San Jose State Univ, Dept Phys, San Jose, CA 95192 USA
关键词
D O I
10.1063/1.1687460
中图分类号
O59 [应用物理学];
学科分类号
摘要
Transient and steady-state measurements of photoinduced birefringence in single-domain and periodically poled lithium niobate (LN) crystals containing different nonphotorefractive impurities are presented. The birefringence change is induced by a 532 nm beam and probed by a 633 nm beam. Data were taken at 25 and 50 degreesC. We find that doping by HfO2 is very effective in reducing the photorefraction. This is interesting also because it is known that hafnium-doped LN crystals can be periodically poled during growth. The analysis of the rise and decay of the induced birefringence shows that doping considerably increases both the photoconductivity and the dark conductivity of the LN crystals. (C) 2004 American Institute of Physics.
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页码:1880 / 1882
页数:3
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