LiNbO3：Fe：Ni晶体非挥发全息存储研究

采用三种不同的双光记录方案进行了LiNbO3：Fe：Ni晶体全息存储实验．详细研究了饱和衍射效率、固定衍射效率、动态范围和记录灵敏度，以及退火条件对记录的影响。结果表明，氧化LiNbO3：Fe：Ni晶体的饱和衍射效率、固定衍射效率和记录灵敏度比其他报道的双掺杂LiNbO3晶体高。结合掺杂能级图，理论分析了LiNbO3双掺杂晶体深陷阱中心能级的相对位置及其微观光学参量对全息记录性能的影响。LiNbO3：Fe：Ni晶体有望成为一种新的高效率非挥发全息存储材料。

Holographic recording experiments of doubly-doped LiNbO3∶Fe∶Ni crystals are conducted by three kinds of different two-color recording schemes. In detail, the saturation diffraction efficiency, the fixing diffraction efficiency, the recording sensitivity and the effect of annealing conditions are investigated experimentally. The results show that the saturation diffraction efficiency, the fixing diffraction efficiency and the recording sensitivity of oxidized LiNbO3∶Fe∶Ni crystal are higher than those of other reported doubly doped LiNbO3 crystals. Based on the doped energy-band diagram, the effect of the relative energy level of the deep trap center and its microcosmic optical parameter on holographic recording properties of doubly doped LiNbO3 is analyzed theoretically. LiNbO3∶Fe∶Ni has the potential of being a new highly efficient nonvolatile holographic recording material.