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Database filter: optoelectronic design and implementation.

R D Snyder, S A Feld, P J Stanko

    Applied Optics
    |July 10, 1997
    PubMed
    Summary
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    This study demonstrates an optoelectronic parallel-processing database filter. It uses logic gates and vertical-cavity surface-emitting lasers (VCSELs) for efficient data selection and matching.

    Area of Science:

    • Optoelectronics
    • Computer Engineering
    • Database Systems

    Background:

    • Traditional database filtering can be a bottleneck in high-throughput data processing.
    • Optoelectronic systems offer potential for faster parallel processing due to the speed of light.

    Purpose of the Study:

    • To present the successful demonstration of a selection module for an optoelectronic parallel-processing database filter.
    • To detail the design and functionality of the integrated logic gate arrays and optical interconnections.

    Main Methods:

    • Fabrication of 4x4 arrays of AND and XOR logic gates using InGaP/GaAs heterojunction phototransistors.
    • Integration of these phototransistors to drive vertical-cavity surface-emitting lasers (VCSELs) for optical interconnections.
    • System design and optical power budget analysis.

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    Main Results:

    • Successful demonstration of the selection module's functionality.
    • The AND gates reduced data fields, while XOR gates performed data matching.
    • VCSELs enabled effective free-space optical interconnection between module stages.

    Conclusions:

    • The developed optoelectronic selection module shows promise for high-speed database filtering.
    • The system design effectively utilizes optical interconnections for parallel processing.
    • Further optimization of the optical power budget is crucial for scalability.