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Optical Data Storage Using Diffractive Optical Elements.

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Title: Optical Data Storage Using Diffractive Optical Elements.
Authors: Yoshida, S.1, Yamada, K.1, Unno, N.1, Taniguchi, J.1, Yamamoto, M.1
Source: PIERS Proceedings. Aug2013, p683-686. 4p.
Subjects: Diffractive optical elements, Read-only memory, Information retrieval research, Holographic storage devices (Computer science), Optical disks, Iterative methods (Mathematics), Mathematical regularization, Fourier transforms
Abstract: The diffractive optical element (DOE) can transform wavefront and generate arbitrary intensity distribution. In this study, we focus on these functions of DOE, and examined the possibility as read-only memory (ROM) usage of the DOE. The DOE based optical data storage is thought of as a kind of holographic data storage (HDS) using thin holograms. In the HDS, digital data is recorded and read out as modulated two-dimensional page data, instead of bit-by-bit recording in conventional optical disks. We design and optimize the DOE using the iterative method with regularization. In the design and optimization process, we use iterative Fourier transform algorithm that is known as Gerchberg-Saxton algorithm. Designed and optimized DOE is fabricated by ultraviolet (UV) nanoimprinting technology. By adopting nanoimprinting technology, high productivity can be expected. Fabricated DOE is evaluated in the experiment. We verify that DOE for optical data storage can be actualized. [ABSTRACT FROM AUTHOR]
Copyright of PIERS Proceedings is the property of Electromagnetics Academy and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: The diffractive optical element (DOE) can transform wavefront and generate arbitrary intensity distribution. In this study, we focus on these functions of DOE, and examined the possibility as read-only memory (ROM) usage of the DOE. The DOE based optical data storage is thought of as a kind of holographic data storage (HDS) using thin holograms. In the HDS, digital data is recorded and read out as modulated two-dimensional page data, instead of bit-by-bit recording in conventional optical disks. We design and optimize the DOE using the iterative method with regularization. In the design and optimization process, we use iterative Fourier transform algorithm that is known as Gerchberg-Saxton algorithm. Designed and optimized DOE is fabricated by ultraviolet (UV) nanoimprinting technology. By adopting nanoimprinting technology, high productivity can be expected. Fabricated DOE is evaluated in the experiment. We verify that DOE for optical data storage can be actualized. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of PIERS Proceedings is the property of Electromagnetics Academy and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Information retrieval research
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      – SubjectFull: Fourier transforms
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              Text: Aug2013
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