LiNbO_3∶Cu∶Ce非挥发全息记录掺杂组份比的优化

Optimal Dopant Composition Ratio during Nonvolatile Holographic Recording in LiNbO_3∶Cu∶Ce Crystals

实验研究了掺杂组份比对LiNbO3∶Cu∶Ce晶体非挥发全息记录性能的影响。结果表明,在全息记录过程中,掺杂组份比通过改变晶体的紫外光吸收特性而引起全息记录性能的改变。增加 LiNbO3∶Cu∶Ce晶体中 Cu和 Ce的掺杂组份比会导致晶体对紫外光吸收的增强,进而提高了全息记录灵敏度和固定衍射效率。在弱氧化处理的掺有CuO和Ce2O3 的质量分数分别为0. 085%和0. 011%的LiNbO3∶Ce∶Cu晶体中,得到了最高的固定衍射效率ηf=32%和记录灵敏度S=0 .022 cm/J。

The effect of dopant composition ratio on nonvolatile holographic recording in LiNbO3:Cu:Ce crystals has been investigated experimentally. The results show that the dopant composition ratio affects the performance of nonvolatile holographic recording by altering the ultraviolet light absorption characteristics of the crystals. Increasing the dopant composition ratio of Cu and Ce leads to an increase in the absorption of ultraviolet light and further to an increase in the recording sensitivity and the fixed diffraction efficiency. The maximum values of the fixed diffraction efficiency ηf = 32% and the recording sensitivity S = 0. 022 cm/J are measured from a weakly oxidized LiNbO3:Ce:Cu crystal doped with 0.085% CuO and 0.011% Ce2O3.