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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Coherent supercontinuum shaping for multiple wavelength optimization over an octave.

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    We precisely control supercontinuum spectra from fiber lasers using chirped fiber Bragg gratings. This enables optimized power for atomic clocks and frequency transfer applications with high coherence.

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    Area of Science:

    • Quantum optics and spectroscopy
    • Laser physics and nonlinear optics
    • Optical frequency metrology

    Background:

    • Supercontinuum generation is crucial for broadband light sources.
    • Precise control over spectral characteristics is needed for advanced applications.
    • Fiber lasers offer compact and robust platforms for supercontinuum generation.

    Purpose of the Study:

    • To demonstrate spectral shaping of octave-spanning supercontinuua.
    • To control group delay dispersion using a temperature-controlled chirped fiber Bragg grating.
    • To optimize power at specific wavelengths for metrology and frequency transfer.

    Main Methods:

    • Utilizing an erbium fiber laser for supercontinuum generation.
    • Employing a chirped fiber Bragg grating with a tailored temperature profile for dispersion control.
    • Interferometric verification of spectral coherence and frequency stability.

    Main Results:

    • Demonstrated control over spectral broadening and switching in spectral windows.
    • Achieved optimized power at six key wavelengths, including atomic clock transitions and frequency comb components.
    • Verified locking of the shaped f-2f beat note with a relative frequency deviation of 10⁻¹⁷ at 1 s averaging time.

    Conclusions:

    • The developed method allows precise spectral engineering of supercontinuum light.
    • The shaped supercontinuua are suitable for high-precision frequency metrology and optical clock applications.
    • High coherence and frequency stability of the shaped supercontinuum were experimentally confirmed.