【摘要】 在同成分LiNbO3中,掺入ZnO的摩尔分数分别为1%、3%、5%、7%和9%,掺入(质量分数)0.03%MnCO3和0.08%Fe2O3,采用提拉法生长了优质Zn∶Mn∶Fe∶LiNbO3晶体.测试Zn∶Mn∶Fe∶LiNbO3晶体的OH-红外吸收光谱,抗光损伤能力和位相共轭性能.Zn离子浓度在7%和9%时,OH-吸收峰移到3 528cm-1,讨论OH-吸收峰移动机理.随着Zn离子浓度增加,抗光损伤能力增加.Zn离子浓度增加到7%,达到阈值.Zn∶Mn∶Fe∶LiNbO3晶体抗光损伤能力比LiNbO3晶体高二个数量级,研究高掺锌Mn∶Fe∶LiNbO3晶体抗光损伤增强机理.随着Zn离子浓度增加,Zn∶Mn∶Fe∶LiNbO3晶体位相共轭反射率降低,位相共轭响应速度增加.Zn∶Mn∶Fe∶LiNbO3晶体位相共轭镜消除了光波的位相畸变.以Zn∶Mn∶Fe∶LiNbO3晶体作存储介质进行全息关联存储实验.讨论全息关联存储的工作原理.以原图象的25%和50%进行寻址,在输出平面上接收到较完整的存储图象.更多还原

【Abstract】 Zn∶Mn∶Fe∶LiNbO3 crystals with 1%,3%,5%,7% and 9%,ZnO(in mole) and MnCO3 and Fe2O3,added at concentration of 0.03%and 0.08(in mass)respectively,were grown by Czochralski method from congruent LiNbO3 melting.The OH-infrared absorption spectra,the optical damage resistance and phase conjugate properties of Zn∶Mn∶Fe∶LiNbO3 crystals were tested.When Zn2+ concentration reaches 7% and 9%,OH-absorption peaks shift to 3 528 cm-1.The mechanism of OH-1 absorption peaks shift were discussed.The optical damage resistance ability of Zn∶Mn∶Fe∶LiNbO3 crystals increase,with the increase of Zn2+ concentration.When Zn2+ concentration reaches to 7%(reaches threshold value),the optical damage resistance ability are two orders of magnitude higher than that of LiNbO3 crystals.The enhancement mechanism of optical damage resistance of highly doping zinc Mn:Fe: LiNbO3 crystals was researched.The bhase conjugate reflectivity decreases and phase conjugate response speed increases,with the increase of Zn2+ concentration.The phase conjugate mirror has eliminate optical wave phase distortion.The holographic associative storage experiment was carried out using Zn∶Mn∶Fe∶LiNbO3 crystals as storage medium.The working principle of holographic associative storage was discussed.Using 25% and 50% addressing,the intact storage image was received in output plane.更多还原