Digital Image Diffusion Technique for Suppressing Interpage Crosstalk in Holographic Data Storage
Digital Image Diffusion Technique for Suppressing Interpage Crosstalk in Holographic Data Storage
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DOI：
10.7567/jjap.52.09ld03
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发表时间：
2013-09
影响因子：
1.5
通讯作者：
A. Shibukawa;A. Okamoto;Y. Wakayama;A. Tomita;H. Funakoshi;Kunihiro Sato
中科院分区：
文献类型：
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作者：
A. Shibukawa;A. Okamoto;Y. Wakayama;A. Tomita;H. Funakoshi;Kunihiro Sato
为了抑制严重限制全息存储容量的页间串扰，提出了一种数字图像扩散技术。该技术利用随机漫射器和相位共轭光的特性，从传播角差中分离出信号和串扰分量。该技术的最大特点是通过有效地集成光学处理和数字处理，在保持传统全息存储系统基本不变的情况下进行串扰抑制。通过使用两个用于复振幅产生的空间光调制器和用于复振幅测量的相位检测方法来实现两种类型的处理之间的连接。模拟结果表明，当扩散板的扩散角为10°时，与传统的复用方法相比，该方法可以将记录密度提高5.5倍，将移位间距减小5倍。
To suppress interpage crosstalk that strongly restricts holographic data storage capacity, a digital image diffusion technique was proposed. In this technique, signal and crosstalk components are separated from the propagation angle difference produced by using a random diffuser and the nature of phase conjugate lights. The most attractive feature of the technique is that crosstalk suppression can be conducted while mostly keeping the conventional holographic data storage system unchanged by integrating optical processing and digital processing effectively. The connection between the two types of processing is realized by using two spatial light modulators for complex amplitude generation and phase detection methods for complex amplitude measurement. The simulation results showed that the proposed technique could increase the recording density 5.5-fold and reduce the shift pitch by a factor of 5 in comparison with conventional multiplexing methods when the diffusion angle of the diffuser is 10°.