Numerical simulations on the focus-shift multiplexing technique for self-referential holographic data storage

Numerical simulations on the focus-shift multiplexing technique for self-referential holographic data storage
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自参考全息数据存储焦移复用技术的数值模拟

DOI:
10.1007/s10043-016-0254-2
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
T. Okamoto
T. Okamoto
中科院分区:
--
文献类型:
--
作者:
M. Takabayashi;Taisuke Eto;T. Okamoto

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为了增加全息数据存储(HDS)的数据密度,结合两种以上的复用技术是有效的。这在自参考全息数据存储 (SR-HDS) 中也是如此,它可以纯粹使用单光束进行全息记录。本文将焦点移位复用技术应用于移位复用SR-HDS,其可行性已在我们之前的工作中得到证明。焦移复用技术通过稍微改变物镜的焦距来实现数据页的复用。但复用所需的焦移距离以及焦移的实现方法尚未明确。首先,通过数值模拟研究焦点移动选择性。在将焦点移位复用技术应用于移位复用SR-HDS的情况下,阐明页间串扰特性以决定能够实现低串扰读出的记录布局。其次,介绍了在空间光调制器(SLM)上显示附加相位图案的技术,这是一种无需任何特殊光学元件(例如变焦镜头)的焦移方法。最后,我们研究了焦点移动精度与SLM参数之间的关系。
For increasing the data density of holographic data storage (HDS), combining more than two multiplexing techniques is effective. This is also true in self-referential holographic data storage (SR-HDS) that enables holographic recording purely with a single beam. In this paper, a focus-shift multiplexing technique is applied to-shift multiplexed SR-HDS, the feasibility of which has been shown in our previous work. The focus-shift multiplexing technique enables the multiplexing of datapages by slightly changing the focal length of the objective lens. However, the required focus-shift distance for multiplexing and the implementation method of the focus-shift have not been clarified. First, the focus-shift selectivity is investigated by the numerical simulations. In the case where the focus-shift multiplexing technique is applied to-shift multiplexed SR-HDS, the inter-page crosstalk properties are clarified to decide the recording layout that can achieve a low-crosstalk readout. Second, the technique of displaying an additional phase pattern onto the spatial light modulator (SLM) is introduced, which is a focus-shift method without any special optical components, such as varifocal lenses. Finally, we investigate the relationship between the accuracy of the focus-shift and the parameters of SLM.
DOI: 10.1364/oe.21.003669
发表时间: 2013-02
期刊: Optics express
影响因子: 3.8
作者:
M. Takabayashi;A. Okamoto
通讯作者: M. Takabayashi;A. Okamoto
DOI: --
发表时间: 2013
期刊:
影响因子: --
作者:
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通讯作者: and Takashi Okamoto
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DOI: --
发表时间: 2009
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作者:
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通讯作者: Takayuki Hoshi
DOI: --
发表时间: 2009
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作者:
梅澤浩光;Y.Suzuki;高木宏幸;井上光輝
通讯作者: 井上光輝