Numerical analysis of volume holograms with spherical reference wave based on Born approximation
Numerical analysis of volume holograms with spherical reference wave based on Born approximation
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DOI：
10.1117/12.2017279
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发表时间：
2013-05
期刊：
影响因子：
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通讯作者：
S. Yoshida;M. Yamamoto
中科院分区：
文献类型：
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作者：
S. Yoshida;M. Yamamoto
全息数据存储(HDS)是实现高数据容量和高数据传输速率的下一代存储技术之一。由于信息被三维记录在厚介质中，因此HDS的数据容量不受衍射限制。然而，波前在非均匀厚介质中的行为是非常复杂的，很难解析地处理波前在介质中的传播。因此，我们建立了一种分析体全息图的数值方法。该方法基于标量衍射理论，可描述为体积积分方程解。通过将Born近似和角谱方法应用于体积积分方程，该技术可适用于各种问题。分析了球面参考波的体全息图的特性，验证了该方法的有效性。与传统的耦合波分析、光束传播法和时域有限差分方法相比，该方法在各种问题上都具有应用潜力，且易于实现。在这项研究中，我们通过对球面参考波的体全息图的分析，证明了所提出的方法的有效性。可以预期，所提出的技术可能成为HDS系统设计的工具。
Holographic Data Storage (HDS) is one of the next generation storage technologies that can actualize high data capacity and high data transfer rate. Since information is recorded 3-dimensionally in a thick medium, data capacity of the HDS is not constrained by diffraction limit. However, behavior of wavefront in an inhomogeneous thick medium is highly complex, and it is hard to handle propagation of wavefront in the medium analytically. Therefore, we establish a numerical technique for analysis of volume holograms. The proposed technique is based on the scalar diffraction theory, which is described as the volume integral equation. By applying Born approximation and angular spectrum method to the volume integral equation, the technique can be applicable for various problems. We analyze characteristics of the volume hologram with spherical reference wave, and confirm effectiveness of the proposed technique. Compared to conventional techniques such as coupled wave analysis, beam propagation method, and finite-difference time domain method, the proposed technique has application potentiality for various problems, and it is easy to implement. In this study, we show effectiveness of the proposed technique by applying to analysis of the volume hologram with spherical reference wave. It can be expected that the proposed technique may become a tool for design of HDS systems.