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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
Timeline
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
DUNS: N/A
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
N/A
Abstract
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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