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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Flat, rectangular frequency comb generation with tunable bandwidth and frequency spacing.

Stefan Preussler, Norman Wenzel, Thomas Schneider

    Optics Letters
    |April 3, 2014
    PubMed
    Summary
    This summary is machine-generated.

    Researchers created tunable optical frequency combs with adjustable spacing and bandwidth using Mach-Zehnder modulators. This technique allows for flexible generation of flat frequency combs for various applications.

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    Area of Science:

    • Photonics
    • Optical Engineering

    Background:

    • Optical frequency combs are crucial for precise frequency measurements and advanced spectroscopy.
    • Existing methods for generating tunable frequency combs often face limitations in flatness or bandwidth.

    Purpose of the Study:

    • To demonstrate a novel method for generating flat, rectangular optical frequency combs with tunable frequency spacing and bandwidth.
    • To achieve high flatness and significant bandwidth in the generated combs.

    Main Methods:

    • Extraction of specific lines or sidebands from an existing frequency comb (e.g., femtosecond fiber laser).
    • Processing of extracted optical signals using two Mach-Zehnder modulators.
    • Tuning of frequency spacing and bandwidth through modulator control.

    Main Results:

    • Successful generation of flat, rectangular optical frequency combs with tunable spacing.
    • Achieved a maximum bandwidth of 260 GHz, with potential for higher bandwidths.
    • Demonstrated overall flatness within 0.6 dB.

    Conclusions:

    • The Mach-Zehnder modulator approach provides a flexible and effective method for generating tunable optical frequency combs.
    • The demonstrated technique offers a scalable solution for producing high-performance optical frequency combs for diverse scientific and technological applications.