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13 March 2024 Shift multiplexing surface holographic data storage
Soki Hirayama, Ryushi Fujimura, Yoshito Y. Tanaka, Tsutomu Shimura
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Proceedings Volume 12909, Ultra-High-Definition Imaging Systems VII; 1290905 (2024) https://doi.org/10.1117/12.3008443
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
Surface holograms, such as computer-generated holograms, as a recording medium enable optical data storage systems that combine high-speed readout, semi-permanent storage lifetime, and mass production. We proposed a unique system that enables simultaneous parallel readout of multi-channel time series signals by shift multiplexing hundreds of surface holograms. The degradation of readout signals caused by Raman-Nath diffracted light, which had been the greatest scientific challenge, was significantly improved by properly designing signal and reference light patterns. The storage density and data transfer rate of the proposed system with this method were quantitatively evaluated considering the signal-to-noise ratio. The recording density was estimated to be comparable to current optical disks, which are limited by the diffraction limit. On the other hand, it was estimated that the proposed system can be expected to simultaneously readout time series signals with approximately 500 times more channels than an optical disk.
Conference Presentation
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Soki Hirayama, Ryushi Fujimura, Yoshito Y. Tanaka, and Tsutomu Shimura "Shift multiplexing surface holographic data storage", Proc. SPIE 12909, Ultra-High-Definition Imaging Systems VII, 1290905 (13 March 2024); https://doi.org/10.1117/12.3008443
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KEYWORDS
Multiplexing
Data storage
Holography
Holograms
3D image reconstruction
Diffraction
Diffraction limit
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