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Error Sources and Performance Limits in Digital Holographic Data Storage

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Abstract

Starting with the work of van Heerden1, many estimates of the potential storage capacity of a holographic data storage system have been made. While some effort has been made to theoretically predict2–3 and to measure4–5 the practical limits imposed by noise sources, most results deal with fundamental limits imposed by the finite spatial frequency resolution of the recording medium and the optical system. We are interested in characterizing the noise statistics in a typical holographic storage system and using these statistics to predict the ultimate limits on system performance. Toward this end, we have developed theoretical models to describe several fundamental noise sources. These models are used to predict limits on the storage capacity and transfer rate achievable in a practical device. We have constructed an experimental system that is used to obtain data on bit-error-rate performance and to verify theoretical predictions. Finally, we are using the experimental system to develop efficient techniques for overcoming noise sources so that we can achieve performance closer to the theoretical limits.

© 1996 Optical Society of America

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