Use of Ga Doping to Suppress Optical Damage in Near-Stoichiometric LiNbO3 Crystals

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概要

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• We investigated the effect of Ga doping on optical damage (photorefractive damage) in near-stoichiometric LiNbO3 (SLN) crystals. SLN crystals doped with Ga (Ga:SLN) were grown from a Li-rich solution by a top-seeded solution growth method. The optical damage resistance of the crystals was investigated at 532 nm. Crystals with a Ga doping concentration of at least 0.49 mol % showed no optical damage. The Ga doping shifted the OH- absorption peak position from 2.88 to 2.85 μm for crystals with a 0.49 mol % concentration. This concentration is lower than the 1 mol % Mg doping concentration required to suppress optical damage in SLN crystals. This attractive optical damage resistance characteristic makes Ga:SLN crystals another candidate as an optical damage resistant material, in addition to Sc-doped SLN crystals, for applications such as electrooptic devices and quasi-phase-matched frequency converters.

• 2009-02-25

著者

• Takekawa Shunji

  Optronic Materials Center National Institute For Materials Science

• KITAMURA Kenji

  Optronic Materials Center, National Institute for Materials Science

• Nakamura Masaru

  Optronic Material Center, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

• Liu Yuowen

  Optronic Material Center, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

• Kitamura Kenji

  Optronic Material Center, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

• Takekawa Shunji

  Optronic Material Center, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

関連論文

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• Isolated Domain Structure and Its Polar-Surface Asymmetry of Ferroelectric BaMgF_4 Single Crystals
• A Comparative Study of Dielectric Relaxation in Sr0.61Ba0.39Nb2O6 and Sr0.75Ba0.25Nb2O6 Single Crystals
• Use of Ga Doping to Suppress Optical Damage in Near-Stoichiometric LiNbO3 Crystals
• Curie Temperature and $[\text{Li}]/([\text{Li}] + [\text{Nb}])$ Ratio of Near-Stoichiometric LiNbO3 Crystal Grown from Different Li-Rich Solutions
• Acoustic Imaging of Ferroelectric Domains in BaTiO3 Single Crystals Using Atomic Force Microscope
• Isolated Domain Structure and Its Polar–Surface Asymmetry of Ferroelectric BaMgF4 Single Crystals

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