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Exploring the limits in Optical Data Storage

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Abstract

Optical data storage devices have been steadily increasing in capacity and performance since their introduction. This increase has now reached a point where it is almost at the diffraction limit for light of practical wavelengths. This limitation has led to research in new ways of storing data so that storage density can continue to increase [1]. One such method involves storing more than one information bit per storage location, and is sometimes known as optical ‘multiplexing’. Here we investigate using phase masks with different geometrical structures as a method of increasing the capacity beyond the conventional diffraction limit.

© 2007 Optical Society of America

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