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。

We present a new volume holographic data storage architecture which consists of two photorefractive crystals storing exactly the same contents. Without a phase conjugator, the new architecture is capable of fast self enhancement of the stored gratings by using two temporally modulated plane waves. The effects of the modulation rate, reading beams′ intensity ratio, initial fixed grating strength and the crystals′ nonlinear coupling strength on the enhancement speed and steady state diffraction efficiency are discussed.