镁铟共掺杂铌酸锂晶体的生长及光学性能

在同成分铌酸锂(LiNbO3,LN)体中掺入3%(摩尔分数,下同)MgO,并分别掺入0.5%,1%,1.5%In2O3,用提拉法生长了一系列Mg:In:LN晶体.通过紫外坷见吸收光谱测试确定了晶体样品的组成和缺陷结构.通过透射光斑畸变法检测Mg:In:LN晶体抗光损伤能力.结果表明:Mg:In:LN晶体抗光损伤能力比纯LN晶体提高2个数量级.以波长为1 064nm的Nd:YAG激光为基频光源,对Mg:In:LN晶体的倍频性能进行了测试.结果表明:Mg:In:LN晶体的相位匹配温度在室温附近,Mg:In:LN晶体的倍频效率要高于In:LN晶体和Mg:LN晶体.

GROWTH OF Mg, In CO-DOPED LITHIUM NIOBATE CRYSTALS AND THEIR OPTICAL PROPERTIES

A series of MgInLiNbO3 (MgInLN) crystals co-doped with 3% (mole fraction, the same below) MgO and 0.5%, 1% or1.5% In2O3 were grown by the Czochralski method. The crystal composition and structure defects were analyzed by ultravio-let-visible spectroscopy. The photo-damage resistance of the MgInLN crystals was observed by straightly observing transmissionfacula distortion method. The results show that the photo-damage resistance of the MgInLN crystals increases two orders of magni-tude compared with that of pure LN crystal. Using a NdYAG laser with a wavelength of 1 064nm as the fundamental frequency light,the second harmonic generation (SHG) property of the MgInLN crystals was measured. The results show that the phase-matchingtemperature of the MgInLN crystals is near room temperature, and the SHG efficiency of the MgInLN crystals is higher than thatof Mg-doped and In-doped LN crystals.