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中文摘要：
以双中心模型为基础，研究了连续光条件下LiNbO3：Fe：Mn晶体在稳态情况下的非挥发双色二步全息存储性能．在各种实验条件下通过比较双中心模型中深（Mn^2＋／Mn^3＋）、浅（Fe^2＋／Fe^3＋）能级之间所有可能的电子交换过程，发现由深浅能级之间直接电子交换过程所导致的隧穿效应对LiNbO3：Fe：Mn晶体总的空间电荷场的大小起着决定性的作用．同时，这一电子交换过程对晶体非挥发全息存储性能也起着至关重要的作用．
英文摘要：
The steady-state nonvolatile two-step, two-color holographic recording performance with continuous-wave lights for LiNbO3 ：Fe： Mn was studied theoretically based on the two-center model. By comparing all of the different electron transfer processes between the deep-trap centers （ Mn2 ＋/Mn3＋ ） and the shallow-trap centers （ Fe2 ＋/Fe3 ＋ ）, our results show that the direct electron exchange between the Mn2 ＋/Mn3 ＋ and the Fe2＋/Fe3＋ levels due to the tunneling effect dominates the amplitude of total space charge field under different experimental conditions in LiNbO3 ：Fe：Mn. This direct electron transfer process also plays a key role in the two-step, two-color holography performance of the crystal.
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