12 April 2007 The photorefractive effect in LiNbO3 crystals
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Proceedings Volume 6609, 15th Czech-Polish-Slovak Conference on Wave and Quantum Aspects of Contemporary Optics; 660906 (2007); doi: 10.1117/12.739369
Event: 15th Czech-Polish-Slovak Conference on Wave and Quantum Aspects of Contemporary Optics, 2006, Liberec, Czech Republic
Abstract
The contribution presents results of the experimental investigation of the photorefractive effect in LiNbO3 crystals obtained from light diffraction observed on photorefractive records of periodic optical field and obtained from interference images of refractive index modulation in the records. These results are compared with results following from equations describing the process of the photorefractive record formation in cases when various mechanisms of generation of the internal electric current responsible for photorefractive effect are taken into account. The comparison between the calculated and measured dependences shows that the modulation of the refractive index is not caused by the electro-optical effect (as the standard model assumes) but by the redistribution of carriers trapped at the donor centres and by change of their polarisability.
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Ivan Turek, Norbert Tarjányi, "The photorefractive effect in LiNbO3 crystals", Proc. SPIE 6609, 15th Czech-Polish-Slovak Conference on Wave and Quantum Aspects of Contemporary Optics, 660906 (12 April 2007); doi: 10.1117/12.739369; https://doi.org/10.1117/12.739369
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KEYWORDS
Modulation

Refractive index

Diffraction

Crystals

Neodymium

Diffusion

Diffraction gratings

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