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

Content Provider	Springer Nature Link
Author	Takabayashi, Masari Eto, Taisuke Okamoto, Takashi
Copyright Year	2016
Abstract	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 $$xy$$ -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 $$xy$$ -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.
Starting Page	987
Ending Page	996
Page Count	10
File Format	PDF
ISSN	13406000
Journal	Optical Review
Volume Number	23
Issue Number	6
e-ISSN	13499432
Language	English
Publisher	Springer Japan
Publisher Date	2016-08-03
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Volume holographic memory Hologram multiplexing Focus-shift multiplexing Spatial phase modulation Optics, Lasers, Photonics, Optical Devices Atomic, Molecular, Optical and Plasma Physics Quantum Optics Microwaves, RF and Optical Engineering
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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