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Proceedings Paper

Storage capacity of pixelated paraxial diffractive elements
Author(s): Stephan Teiwes; Heiko Schwarzer; Frank Wyrowski; Harald Aagedal
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Paper Abstract

Diffractive optics finds attractive applications in the development of optical data storage systems. The performance of these systems is measured by their storage capacity specifying the amount of information that can be stored. In this paper information theory is applied to derive statements on the capacity of optical storage systems that make use of pixelated paraxial diffractive elements. It is motivated that the storage capacity of diffractive elements is directly correlated with the amount of information that can be correctly transmitted via a noisy communication channel consisting of the storage medium, free space, and a detector. Examinations on the storage capacity are restricted to noise effects due to the modulation characteristics of the storage medium. In this context redundant encoding schemes are shown to be useful to optimize the information capacity. Finally, in an experiment the storage capacity of a storage system with phase modulating diffractive elements is derived using the proposed methods.

Paper Details

Date Published: 27 December 1996
PDF: 7 pages
Proc. SPIE 2969, Second International Conference on Optical Information Processing, (27 December 1996); doi: 10.1117/12.262593
Show Author Affiliations
Stephan Teiwes, Berlin Institute of Optics (Germany)
Heiko Schwarzer, Berlin Institute of Optics (Germany)
Frank Wyrowski, Berlin Institute of Optics (Germany)
Harald Aagedal, Univ. of Karlsruhe (Germany)

Published in SPIE Proceedings Vol. 2969:
Second International Conference on Optical Information Processing
Zhores I. Alferov; Yuri V. Gulyaev; Dennis R. Pape, Editor(s)

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