Optica Applicata 2009(Vol.39), No.3, pp. 587-599


Investigation of nonlinearity of photorefractive effect in LiNbO3
Ivan Turek, Norbert Tarjanyi

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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