Digital data storage in a phase-encoded holographic memory system: data quality and security

Gernot Berger; Kai-Oliver Mueller; Cornelia Denz; Istvan Foldvari; Agnes Peter

doi:10.1117/12.501107

1 July 2003 Digital data storage in a phase-encoded holographic memory system: data quality and security

Gernot Berger, Kai-Oliver Mueller, Cornelia Denz, Istvan Foldvari, Agnes Peter

Proceedings Volume 4988, Advanced Optical Data Storage; (2003) https://doi.org/10.1117/12.501107
Event: Integrated Optoelectronics Devices, 2003, San Jose, CA, United States

Abstract

We review the crucial properties of a phase-encoded volume holographic storage system in terms of data quality and security, which are the key issues of any bulk memory system. Two major problems which need to be tackled in holographic storage systems in terms of data quality are the hologram erasure during readout and the data encoding schemes for error-free reconstruction. We present a novel storage material, (bismuth tellurite crystals - Bi₂TeO₅), which has the potential to overcome the volatility problem and avoiding the need of any further fixing. Regarding data encoding schemes, we present a general approach of gray scale modulation coding in order to improve the data capacity in comparison to normal modulation coding, while the bit error rate maintains low. Data security in a phase encoded system can be realized by exploiting its special multiplexing characteristics. We present different encryption techniques and investigate their decryption probability.

Citation Download Citation

Gernot Berger, Kai-Oliver Mueller, Cornelia Denz, Istvan Foldvari, and Agnes Peter "Digital data storage in a phase-encoded holographic memory system: data quality and security", Proc. SPIE 4988, Advanced Optical Data Storage, (1 July 2003); https://doi.org/10.1117/12.501107

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