Numerical evaluation of shift multiplexing using a spherical wave in a holographic memory based on a computer-generated hologram

Teruyoshi Nobukawa; Takanori Nomura

doi:10.1117/12.2237631

8 September 2016 Numerical evaluation of shift multiplexing using a spherical wave in a holographic memory based on a computer-generated hologram

Teruyoshi Nobukawa, Takanori Nomura

Author Affiliations +

Proceedings Volume 9959, Optical Data Storage 2016; 99590B (2016) https://doi.org/10.1117/12.2237631
Event: SPIE Optical Engineering + Applications, 2016, San Diego, California, United States

Abstract

Shift multiplexing method using a spherical wave is proposed for a holographic memory system based on a computer-generated hologram (CGH). In the proposed method, a propagated signal beam along an optical axis is generated by a CGH. The zero order beam of the CGH is obtained as a point source in the Fourier plane. This point source becomes a spherical reference beam on a recording medium by displacing a Fourier transform lens. The use of the spherical reference beam allows us to implement shift multiplexing in the holographic memory based on a CGH. Shift selectivity of the proposed method is numerically evaluated. In addition, shift multiplexing with the proposed method is numerically demonstrated.

Citation Download Citation

Teruyoshi Nobukawa and Takanori Nomura "Numerical evaluation of shift multiplexing using a spherical wave in a holographic memory based on a computer-generated hologram", Proc. SPIE 9959, Optical Data Storage 2016, 99590B (8 September 2016); https://doi.org/10.1117/12.2237631

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