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Investigation of nonlinearity of photorefractive effect in LiNbO3

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Author(s): Ivan Turek | Norbert Tarjanyi

Journal: Optica Applicata
ISSN 0078-5466

Volume: 39;
Issue: 3;
Start page: 587;
Date: 2009;
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Keywords: photorefractive effect | lithium niobate

ABSTRACT
In this paper, the nonlinearities resulting from the simple band transport model of photorefractivity are compared with dependences experimentally obtained in LiNbO3:Fe crystals. The investigation of nonlinearities is performed for both periodic and aperiodic optical fields. The comparison shows that the space-charge field cannot be the main cause of light-induced refractive index changes.
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