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Related Experiment Video

Updated: May 3, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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Tunable optical correlator using an optical frequency comb and a nonlinear multiplexer.

Morteza Ziyadi, Mohammad Reza Chitgarha, Salman Khaleghi

    Optics Express
    |February 12, 2014
    PubMed
    Summary
    This summary is machine-generated.

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    This study presents a tunable optical correlator for efficiently searching multiple patterns within Quadrature Phase Shift Keying (QPSK) symbols. The system successfully identifies various patterns in a 40-Gb/s optical signal.

    Area of Science:

    • Optical Engineering
    • Signal Processing
    • Telecommunications

    Background:

    • Quadrature Phase Shift Keying (QPSK) is a widely used modulation scheme in high-speed optical communication systems.
    • Efficiently searching for multiple patterns within complex data streams is crucial for various applications, including optical signal processing and network monitoring.

    Purpose of the Study:

    • To experimentally demonstrate a novel tunable optical correlator.
    • To enable the simultaneous search for multiple patterns within QPSK symbols.

    Main Methods:

    • Utilized an optical frequency comb to generate coherent optical signals.
    • Employed coherent multiplexing of signals within a single Periodically Poled Lithium Niobate (PPLN) waveguide.
    • Implemented a tunable optical correlator architecture.

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    Last Updated: May 3, 2026

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    Quasi-light Storage for Optical Data Packets
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    Main Results:

    • Successfully demonstrated the search for multiple patterns with varying lengths.
    • Achieved pattern searching within a 40-Gb/s QPSK signal.
    • Validated the tunability of the optical correlator.

    Conclusions:

    • The developed tunable optical correlator is effective for multi-pattern searching in high-speed QPSK signals.
    • This technology offers potential for advanced optical signal processing and monitoring.