提出一种新型全息数据存储结构。该结构包含两块存储内容完全相同的光折变晶体，无需相位共轭器，仅利用两束时域快速调制的平面参考光波便可实现对存储全息图的迅速增强。文章讨论了调制速率、读出光强比、晶体非线性耦合强度及初始光栅强度对增强速度及可获得的饱和衍射效率的影响。 A new holographic data storage structure is proposed. The structure consists of two photorefractive crystals with exactly the same stored content, eliminating the need for a phase conjugator, and rapid enhancement of the stored hologram using only two planar reference beams modulated in time domain. The effects of modulation rate, readout ratio, nonlinear coupling strength and initial grating intensity on the enhancement speed and the saturation diffraction efficiency are discussed.