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Science 3 October 1997:
Vol. 278. no. 5335, pp. 96 - 100
DOI: 10.1126/science.278.5335.96
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Reports

Time-Domain Holographic Digital Memory

Xiao A. Shen, An-Dien Nguyen, John W. Perry, * David L. Huestis, Ravinder Kachru dagger

An optical storage technique based on time-domain holography for the rapid recording and readout of page-formatted digital data is demonstrated. Storage of 356 kilobits of data was achieved at a single spatial location in a rare-earth-doped crystal. The digital data were recorded and accurately retrieved at a peak rate of 300 megabits per second without the use of error-correcting codes. The system's raw bit error rate is about 10-7. This low bit error rate was achieved by a detection scheme for extraction of binary data. These results have implications for dynamic optical memory.

Molecular Physics Laboratory, SRI International, Menlo Park, CA 94025, USA.
*   Permanent address: Department of Computer Science and Mathematics, Carleton College, Northfield, MN 55057, USA.

dagger    To whom correspondence should be addressed. E-mail: kachru{at}mplvax.sri.com

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Science. ISSN 0036-8075 (print), 1095-9203 (online)