Zr: Fe: LiNbO3晶体的关联存储性能

为了测试Zr:Fe:LiNbO3晶体的红外光谱、抗光折变阈值、位相共轭和全息关联存储性能,采用Czochralski方法生长Zr:Fe:LiNbO3晶体。通过实验得出Zr:Fe:LiNbO3晶体红外光谱对应的OH-吸收峰移到3488cm-1;随着Zr4+摩尔分数的增加,Zr(摩尔分数xZr=0.06):Fe:LiNbO3晶体抗光折变阈值比Fe:LiNbO3晶体提高一个数量级以上,且晶体的位相共轭响应速度增加,而位相共轭反射率有所下降,Zr(xZr=0.02):Fe:LiNbO3晶体响应速度比Fe:LiNbO3晶体提高一个数量级;另外,以Zr(xZr=0.04):Fe(质量分数wFe=0.0003):LiNbO3作为存储介质,Zr(xZr=0.06):Fe(wFe=0.0003):LiNbO3晶体作为位相共轭镜,进行全息关联存储实验,在输出平面上接收到较完整的存储图像。结果表明,Zr:Fe:LiNbO3晶体具有强的抗光折变能力与优良的关联存储性能。

The associative storage properties of Zr: Fe: LiNbO3 crystals

In order to measure the IR spectra, photo refractive threshold, phase conjugation and associative storage properties of Zr: Fe: LiNbO3 crystals, the crystals were firstly grown by means of the Czochralski technique. The experiment showed that the OH- vibrational peak corresponding to Zr: Fe: LiNbO3 crystal red-shifted to 3488 cm-1. The optical damage resistance ability of Zr: Fe: LiNbO3 crystal was enhanced with the increase of Zr4+ ion concentration. The optical damage resistance ability of Zr (6 mol %): Fe: LiNbO3 crystal was one order magnitude higher than that of Fe: LiNbO3 crystal. With the increase of doping Zr4+ ions concentration, the response speed of phase conjugation of crystals was improved, and the reflection index of phase conjugation of crystals was weakly decreased, i.e., the speed of Zr (2 mol %): Fe: LiNbO3 crystal was one order magnitude higher than that of Fe: LiNbO3 crystal. Otherwise, when Zr (4 mol %): Fe (0.03 wt %): LiNbO3 crystal was as the storage media and Zr (6 mol %): Fe (0.03 wt %): LiNbO3 crystal was as phase conjugation mirror, the better quality storage image was received by the output plane. The above results show that Zr: Fe: LiNbO3 crystals have strong photorefractive damage ability and excellent associative storage properties.