Abstract

Beam fanning in low-symmetry photorefractive crystals features nonuniform angular distribution of linear polarization. We study this phenomenon experimentally in monoclinic ${\mathrm{Sn}}_2{\mathrm{P}}_2{\mathrm{S}}_6$ crystals that belong to the $m$ class of symmetry and compare the results with the predictions of a simple model that describes amplification of a weak scattered wave via nonlinear coupling to the intense incident wave.

© 2013 Optical Society of America

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