[21a-A310-1~9] CS.2 Code-sharing Session of 3.2 & 4.4

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[21a-A310-8] Evaluation of the Effect of Hologram Discretization on Signal Reconstruction Characteristics in a Shift-Multiplexing Surface Holographic Memory

〇Soki Hirayama¹, Ryushi Fujimura², Yoshito Tanaka³, Tsutomu Shimura¹ (1.IIS The Univ. of Tokyo, 2.Utsunomiya Univ., 3.RIES Hokkaido Univ.)

Keywords:

holographic memory,computer-generated hologram,optical memory

We have provided a method for shift-multiplexing of surface holograms and demonstrated the potential for a novel surface holographic memory system using time series signal coding. Phase modulation depth and spatial distribution of the shift-multiplexed surface holograms in this system are discretized when they are fabricated as computer-generated hologram (CGH). In this study, we evaluated the effects of the hologram discretization on the recording density of the medium and the signal-to-noise ratio of the reconstructed signal by numerical simulation.