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Phase-image-based sparse-gray-level data pages for holographic data storage

机译:基于相位图像的稀疏灰度级数据页面,用于全息数据存储

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摘要

We propose a method for implementation of gray-scale sparse block modulation codes with a single spatial light modulator in phase mode for holographic data storage. Sparse data pages promise higher recording densities with reduced consumption of the dynamic range of the recording material and reduced interpixel cross talk. A balanced sparse-gray-level phase data page gives a homogenized Fourier spectrum that improves the interference efficiency between the signal and the reference beams. Construction rules for sparse three-gray-level phase data pages, readout methods, and interpixel cross talk are discussed extensively. We also explore theoretically the potential storage density improvement while using low-pass filtering and sparse-gray-level phase data pages for holographic storage, and demonstrate the trade-off between code rate, block length, and estimated capacity gain.
机译:我们提出了一种在相位模式下用单个空间光调制器来实现灰度稀疏块调制码的方法,用于全息数据存储。稀疏的数据页保证了更高的记录密度,同时减少了记录材料动态范围的消耗,并减少了像素间的串扰。平衡的稀疏灰度级数据页提供了均匀的傅立叶频谱,可提高信号和参考光束之间的干扰效率。广泛讨论了稀疏的三灰度级相位数据页的构造规则,读出方法和像素间串扰。我们还从理论上探讨了使用低通滤波和稀疏灰度级相位数据页进行全息存储时潜在的存储密度提高,并演示了码率,块长度和估计的容量增益之间的权衡。

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