Abstract
A method is described for the synthesis of single crystals of the type KTa 1−xNb xO 3, which have predetermined and controlled properties for use in electro-optical modulator devices. The crystal is grown at a constant temperature, utilizing a temperature gradient in the melt. This method has yielded large, high optical quality, homogeneous crystals up to 4 × 4 × 3 cm. The composition of the crystals grown varied between KTa 0.70Nb 0.30O 3 and KTa 0.61Nb 0.39O 3, with Curie temperatures ranging from −52°C to +16°C. In a given sample, the Curie temperature varied within ±3°C. An electro-optic effect was observed on these crystals.
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