Quasi-Fourier transform hologram format for data storage

✍ Scribed by H. Ramenah; P. Bertrand; E.H. Soubari; P. Meyrueis

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 473 KB
• Volume: 28
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(96)00028-x

✦ Synopsis

For a recording medium such as dichromated gelatin, a quasi-Fourier transform holographic memory is preferred over the exact Fourier transform. We proceed here with angular multiplexing and consider undesired reconstructed waves such as cross-talk noise, and show that the signal-to-noise ratio is 33 dB for 20 angular multiplexed elements in 25 pm thickness of the recording medium. We also study the energy coupling between gratings to standardize the diffraction efficiency of each multiplexed grating.