Abstract
MgO-doped LiNbO3 (MgLN) single crystals of 6.5mol% have been grown by the Czochralski technique. The MgO-doped crystal shows a shift in the absorption edge towards shorter wavelengths and a three orders of magnitude increase in the photorefractive damage resistance compared to the congruent LiNbO3 (CLN) crystal. This material has been periodically poled at room temperature by applying electric field, and a coercive field of about 5kV/mm has been determined, which is about 14 of that for CLN. Periodic poling of 1mm thick 6.5mol% MgLN substrates has been successfully performed by means of an electric field poling process at room temperature.
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