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。

In order to measure the infrared 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 3488cm-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(mole fraction xZr=0.06):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(xZr=0.02):Fe:LiNbO₃ crystal was one order magnitude higher than that of Fe:LiNbO₃ crystal.Otherwise,when Zr(xZr=0.04):Fe(mass fraction wFe=0.0003):LiNbO₃ crystal was as the storage media and Zr(xZr=0.06):Fe(wFe=0.0003):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.