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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Optical digital processor using arrays of symmetric self-electrooptic effect devices.

M E Prise, N C Craft, M M Downs

    Applied Optics
    |August 12, 2010
    PubMed
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    Researchers built a looped-pipeline optical digital processor using GaAs devices. This system demonstrated shift registers and a decoder circuit, achieving clock speeds of 1 MHz.

    Area of Science:

    • Optoelectronics
    • Digital Processing
    • Semiconductor Devices

    Background:

    • Optical interconnects offer high bandwidth and parallelism for digital systems.
    • Self-electrooptic effect (SEED) devices provide a pathway for optoelectronic integration.
    • Pipeline architectures are crucial for high-throughput digital computation.

    Purpose of the Study:

    • To construct and evaluate a looped-pipeline optical digital processor.
    • To demonstrate the feasibility of optical interconnection for complex digital circuits.
    • To investigate the performance characteristics of GaAs SEED-based systems.

    Main Methods:

    • Optically interconnected four arrays of 32 GaAs symmetric SEED devices.
    • Configured the interconnected devices into a looped-pipeline architecture.

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  • Implemented and tested digital circuits, including shift registers and a decoder.

    • Main Results:

    • Successfully formed a functional looped-pipeline optical digital processor.
    • Demonstrated the operation of two distinct shift register circuits.
    • Showcased a functional decoder circuit within the optical system.
    • Achieved operational clock frequencies up to 1 MHz.

    Conclusions:

    • GaAs SEED devices can be effectively used for optical digital processing.
    • Looped-pipeline architectures are viable for optoelectronic computation.
    • The demonstrated system provides a foundation for more complex optical digital systems.