Secure holographic memory by double-random polarization encryption.
Secure holographic memory by double-random polarization encryption.
复制标题
DOI：
10.1364/ao.43.002915
复制
发表时间：
2004-05
期刊：
影响因子：
1.9
通讯作者：
O. Matoba;B. Javidi
中科院分区：
文献类型：
--
作者：
O. Matoba;B. Javidi
提出了一种新的基于偏振的光学加密方法，并将其应用于全息存储系统。原始二进制数据被描述为两个正交的线偏振态。这些输入偏振态可以通过使用位于输入平面和傅立叶平面的两个偏振调制掩模来调制。每个调制掩模可以将输入偏振状态转换为随机偏振状态。一旦加密，偏振状态就被记录为全息图。对于解密，全息图可以产生矢量相位共轭光束。当使用相同的偏振调制掩模时，矢量相位共轭读出可以消除每个掩模处的偏振调制，并且可以恢复原始偏振状态。所提出的方法的加密进行了数值评估。我们还提出了实验结果，证明全息记录在细菌视紫红质膜。
A novel optical encryption based on polarization is proposed and applied to a holographic memory system. Original binary data are described as two orthogonal linear polarization states. These input polarization states can be modulated by use of two polarization-modulation masks located at the input and the Fourier planes. Each modulation mask can convert an input polarization state into a random polarization state. Once encrypted, the polarization state is recorded as a hologram. For the decryption, the hologram can generate a vector phase-conjugate beam. When the same polarization-modulation masks are used, the vector phase-conjugate readout can cancel the polarization modulation at each mask, and the original polarization state can be recovered. The encryption of the proposed method is evaluated numerically. We also present experimental results by demonstrating holographic recording in a bacteriorhodopsin film.