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Low-Cost Optical Search of Digital Holographic Data Storage System

Award Information
Agency: Department of Defense
Branch: Office of the Secretary of Defense
Contract: N/A
Agency Tracking Number: 37026
Amount: $740,932.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Solicitation Year: N/A
Award Year: 1997
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): N/A
Small Business Information
100 Ferguson Drive, Mountain View, CA, 94039
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Robert R. Mcleod, Ph.d
 (415) 966-3240
Business Contact
Phone: () -
Research Institution
Digital holographic data storage systems currently under development have Terabit storage capacity, as is necessary for the next generation of huge entertainment and business databases. However, even at Gbit/second transfer rates, each search of such a database for a particular item will take a minimum of a quarter of an hour of dedicated, high-speed computing time. In contrast, an all-optical search can be performed in milliseconds, independent of the size of the database. This proposal presents a design which is capable of complex searches of a Gbit of holographically sotred digital data in a msec. While the properties of image-based (analog) volume holographic correlators are known, associative search/correlation of digital folume holographic data present unique problems and opportunities because of the spatially-varying digital data encoding. The choice of optical impmlementation, digital channel encoding, error-correction technique, and data page layout all effect the bit-error-rate, cross correlation suppression, level of association and generalization, and degree and type of shift-invariance of the search engine. The design presented in this proposal maximizes digital search capabilities, and can be added to holographic memory architectures at extremely low additional cost.

* Information listed above is at the time of submission. *

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