Recording/Reproduction Simulation of Holographic Memory Using Three-Dimensional Beam Propagation Method

被引:1
|
作者
Ohori, Tomohiro [1 ]
Yoshida, Shuhei [1 ]
Yamamoto, Manabu [1 ]
机构
[1] Tokyo Univ Sci City Noda, Chiba 2641, Japan
来源
OPTICAL MODELLING AND DESIGN | 2010年 / 7717卷
关键词
D O I
10.1117/12.854113
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The rapid progress in computer performance and widespread use of broadband networks has facilitated the transmission of huge quantities of digital information, thus increasing the need for high-speed, large-capacity storage devices and leading to studies on holographic data storage (HDS). Compared with laser disks where the recording density is limited by optical diffraction, HDS provides ultrahigh capacity with multiplex recording and high-speed transfer greater than 1 Gbps; it has excellent potential for optical memory systems of the future [1]. To develop HDS, a design theory for element technologies such as signal processing, recording materials and optical systems is required. Therefore, this study examines technology for simulating the recording and reproduction for HDS. In simulations thus far, the medium for the recording process has usually been approximated as laminated layers of holographic thin films. This method is suitable for systematic evaluation because the computational cost is low and it allows simulation in the true form of data, that is, in two-dimensional digital data patterns. However, it is difficult to accurately examine the influence of film thickness with a two-dimensional lamination simulation. Therefore, in this study, a technique for analyzing thick-film holograms is examined using the beam propagation method. The results of a two-dimensional simulation assuming laminated, holographic thin films and a three-dimensional simulation using the beam propagation method are compared for cases where the medium need not be treated as a thick film.
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页数:12
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