Photorefractive dynamic properties of Ca2+-doped strontium barium niobate crystals

被引：3

作者：

Gao, Ch. Y. ^{[1
]}

Xia, H. R. ^{[1
,2
]}

Xu, J. Q. ^{[1
]}

Zhou, C. L. ^{[1
]}

Si, Sh. Ch. ^{[1
]}

Zhang, H. J. ^{[2
,3
]}

Wang, J. Y. ^{[2
,3
]}

机构：

[1] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China

[2] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[3] Shandong Univ, Inst Crystal Mat, Jinan 250100, Peoples R China

来源：

APPLIED OPTICS | 2009年 / 48卷 / 02期

关键词：

OPTICAL BEAM; SBN-CE;

D O I：

10.1364/AO.48.000161

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Measurements for photorefractive dynamic properties under polarized light with different luminous intensity and wavelength at 650 nm were performed in calcium-doped strontium barium niobate crystals as a function of the time. Experimental results further validated that the different input luminous intensities influence only the saturated time and photorefractive velocity of the photorefractive crystals. Birefringence experiments suggest that an input luminous intensity oscillatory threshold should exist between 64 mW/cm(2) and 13 mW/cm(2). The dynamic change of refractive index from self-focusing to asymmetric self-defocusing was also measured and regarded as the mutual results of the nonuniform-intensity incidence and positive thermal lens effect, which was validated by a further experiment based on the Michelson interference. Also, oscillation accompanying change in the dynamic indices was analyzed and attributed to the high dielectric effect as well as asymmetric self-defocusing in this investigation. (C) 2009 Optical Society of America

引用

页码：161 / 166

页数：6

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