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Experimental evaluation of user capacity in holographic data-storage systems

机译：全息数据存储系统中用户容量的实验评估

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An experimental procedure for determining the relation between the number of stored holograms and the raw bit-error rate (BER) (the BER before error correction) of a holographic storage system is described. Compared with conventional recording schedules that equalize the diffraction efficiency, scheduling of recording exposures to achieve a uniform raw BER is shown to improve capacity. The experimentally obtained capacity versus the raw-BER scaling is used to study the effects of modulation and error-correction coding in holographic storage. The use of coding is shown to increase the number of holograms that can be stored; however, the redundancy associated with coding incurs a capacity cost per hologram. This trade-off is quantified, and an optimal working point for the overall system is identified. This procedure makes it possible to compare, under realistic conditions, system choices whose impact cannot be fully analyzed or simulated. Using LiNbO3 in the 90 degrees geometry, we implement this capacity estimation procedure and compare several block-based modulation codes and thresholding techniques on the basis of total user capacity. (C) 1998 Optical Society of America. [References: 17]
机译：描述了确定全息图的存储数量与全息存储系统的原始误码率（BER）（纠错之前的BER）之间的关系的实验过程。与使衍射效率均等的常规记录计划相比，显示记录曝光以实现均匀原始BER的计划可提高容量。实验获得的容量与原始BER缩放的关系用于研究全息存储中调制和纠错编码的效果。显示使用编码来增加可以存储的全息图的数量。然而，与编码相关联的冗余导致每个全息图的容量成本。权衡取舍，并确定整个系统的最佳工作点。该程序可以在实际条件下比较其影响无法完全分析或模拟的系统选择。在90度几何形状中使用LiNbO3，我们实现了此容量估算过程，并在总用户容量的基础上比较了几种基于块的调制代码和阈值技术。 （C）1998年美国眼镜学会。 [参考：17]

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