Increased Optical Damage Resistance and Transparency in MgO-Doped LiTaO_3 Simgle Crystals

概要

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Clear and transparent 2-inch diameter undoped and MgO-doped LiTaO_3 single crystals with few Fe impurities have been grown by the conventional Czochralski method from a congruent melt. The optical damage resistance of undoped LiTaO_3 has been characterized by the measurement of photoinduced birefringence change and is lower than that of commercially available LiNbO_3, which is not consistent with the previously reported data in the literature. In addition, doping of a few mol% MgO further improved the optical damage resistance, transmission in the visible light region, and crystal decolorization, and produced a favorable shift of absorption edge toward shorter wavelengths for lithium tantalate. These are important advantages when considering shorter- wavelength accessibility and high conversion efficiency in second-harmonic- generation devices.
社団法人応用物理学会の論文
1995-03-15