Multiplexing holograms for data page storage using a LCD as hybrid ternary modulation

Elena Fernández; Manuel Ortuño; Sergi Gallego; Celia García; Andrés Márquez; Augusto Beléndez; Inmaculada Pascual

doi:10.1117/12.820622

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19 May 2009 Multiplexing holograms for data page storage using a LCD as hybrid ternary modulation

Elena Fernández, Manuel Ortuño, Sergi Gallego, Celia García, Andrés Márquez, Augusto Beléndez, Inmaculada Pascual

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Proceedings Volume 7358, Holography: Advances and Modern Trends; 73581C (2009) https://doi.org/10.1117/12.820622
Event: SPIE Optics + Optoelectronics, 2009, Prague, Czech Republic

Abstract

Holographic data storage is a new optical technology which allows an important number of bits to be stored in a recording material. In this work, holographic data pages were stored in a PVA/acrylamide photopolymer layer using a peristrophic multiplexing method. This material is formed of acrylamide photopolymers, which are considered interesting materials for recording holographic memories. A liquid crystal (LCD) device was used to modify the object beam and store the data pages in the material. This LCD was used to modulate the object beam in order to reduce the zero frequency of the Fourier Transform (FT) of the object. The scheme used to reduce this frequency was hybrid ternary modulation (HTM).

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Elena Fernández, Manuel Ortuño, Sergi Gallego, Celia García, Andrés Márquez, Augusto Beléndez, and Inmaculada Pascual "Multiplexing holograms for data page storage using a LCD as hybrid ternary modulation", Proc. SPIE 7358, Holography: Advances and Modern Trends, 73581C (19 May 2009); https://doi.org/10.1117/12.820622

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