Numerical calculation for volume holograms with the focus-shift multiplexing method

Masaki Tanaka; Kuniaki Okada; Yukiko Nagasaka; Atsushi Nakamura; Kenji Hirano; Yukio Kurata

doi:10.1117/12.739087

11 July 2007 Numerical calculation for volume holograms with the focus-shift multiplexing method

Masaki Tanaka, Kuniaki Okada, Yukiko Nagasaka, Atsushi Nakamura, Kenji Hirano, Yukio Kurata

Proceedings Volume 6620, Optical Data Storage 2007; 66201N (2007) https://doi.org/10.1117/12.739087
Event: Optical Data Storage 2007, 2007, Portland, OR, United States

Abstract

A holographic data storage simulator for the combined multiplexing method which consists of spatial shift, peristrophic, and focus-shift multiplexing has been developed. In the combined multiplexing method, wedge prisms were used to realize the focus-shift multiplexing, so we gave linear phase modulations on the reference beams to represent the effect of wedge prisms in the simulation and successfully got a good agreement between the simulated and experimental results on the diffraction efficiency characteristics. The diffraction efficiency decreases rapidly as the focal position of the reference beams are shifted, which indicates that it is possible to enlarge the capacity of the holographic data storage by the focus-shift multiplexing.

Citation Download Citation

Masaki Tanaka, Kuniaki Okada, Yukiko Nagasaka, Atsushi Nakamura, Kenji Hirano, and Yukio Kurata "Numerical calculation for volume holograms with the focus-shift multiplexing method", Proc. SPIE 6620, Optical Data Storage 2007, 66201N (11 July 2007); https://doi.org/10.1117/12.739087

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