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In:Fe:LiNbO3晶体的生长及其在全息关联存储中的应用 总被引:3,自引:3,他引:0
用提拉法生长1%(摩尔分数,下同)In :Fe :LiNbO3(LN),2%In :Fe :LN,3%In :Fe :LN和Fe :LN晶体,配料中掺入0.03%(质量分数)Fe2O3。采用光斑畸变法测试晶体的光损伤阈值。结果表明:1%In :Fe :LN和2%In :Fe :LN晶体的光损伤阈值比Fe :LN晶体高1个数量级以上。3%In :Fe :LN晶体的光折变阈值比Fe :LN晶体高2个数量级以上。晶体的位相共轭效应测试结果表明,1%In :Fe :LN晶体的位相共轭反射率(R1=185%)高于3%In :Fe :LN晶体(R3=120%)。以3%In :Fe :LN晶体作为存储元件,1%In :Fe :LN晶体作为位相共轭镜.进行全息关联存储实验.其再现图像清晰完整,噪音小。 相似文献
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In:Ho:LiNbO3 crystals doped with various concentrations of In3+(0, 1 mol.%, 3 mol.%, 5 mol.%), fixed concentrations of Ho3+ (1 mol.%) were grown by Czochralski method. The X-ray powder diffraction, infrared and UV-visible absorption spectra were measured and modified. Judd-Ofelt approach was employed to study the effect of In doping on spectroscopic properties of Ho:LiNbO3 crystals. In concentrations in crystals were analyzed by an inductively coupled plasma optical emission spectrometry (ICP-OE/MS). For In (3 mol.%):Ho (1 mol.%):LiNbO3 crystal, the obtained intensity parameters were: Ω2=9.6563, Ω4=4.2195, Ω6=14.1526. The results showed that the Ω2 and Ω6 parameters increased with the increase of In3+ concentration. When the In doping concentration was up to 5 mol.%, Ω2 and Ω6 suddenly decreased. In2O3 incorporation had a strong effect on the radiative lifetime, but had less influence on fluorescence branching ratios. The effective distribution coefficient of In3+ in In:Ho:LiNbO3 crystals was less than 1 and increased with increasing concentration of In3+ in the melt. 相似文献
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采用助溶剂法以TSSG技术生长近化学计量比SInFeLiNbO3晶体.测试S
InFeLiNbO3晶体的晶格常数,SInFeLiNbO3晶体的晶格常数既小于LiNbO3晶体也小于InFeLiNbO3晶体.晶格常数的变化是由于Li+取代反位铌NbLi4+和占据锂空位引起的.测试SInFeLiNbO3晶体的红外光谱,OH-吸收峰移到3503.cm-1,测试SInFeLiNbO3晶体的指数增益系数Γ,SInFeLiNbO3晶体的Γ值达到28cm-1,高于InFeLiNbO3晶体. 相似文献
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在LiNbO3中掺进MgO以提拉法生长Mg(1mol%)LN,Mg(3mol%)LN,Mg(5mol%)LN,Mg(7mol%)LN,和Mg(9mol%)LN晶体.改进晶体生长工艺条件,解决了在生长中出现的脱溶,散射颗粒,生长条纹等缺陷.生长出高质量高掺镁LiNbO3晶体.测试MgLiNbO3晶体的红外光谱,当Mg2+的浓度达到或超过阈值浓度的MgLiNbO3晶体,OH-吸收峰移到3535cm-1,晶体抗光损伤能力比LiNbO3晶体提高两个数量级以上.测试MgLiNbO3晶体的倍频性能(相位匹配温度,倍频转换效率)MgLiNbO3晶体的相位匹配温度随Mg2+浓度的增加而改变,Mg(5mol%)LN,晶体的相位匹配温度达到116℃,Mg(9mol%)LN晶体在室温附近. 相似文献