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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Frequency comb-based multiple-access ultrastable frequency dissemination with 7 × 10(-17) instability.

Shuangyou Zhang, Jianye Zhao

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    |December 23, 2014
    PubMed
    Summary
    This summary is machine-generated.

    We demonstrate a new method for stable frequency dissemination using an optical frequency comb over a 10-km fiber link. This technique enables multiple access and highly stable microwave extraction along the entire fiber.

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    Area of Science:

    • Optical physics
    • Metrology
    • Fiber optics

    Background:

    • Stable frequency dissemination is crucial for advanced scientific applications.
    • Existing methods face limitations in stability and accessibility over long distances.

    Purpose of the Study:

    • To demonstrate a novel frequency-comb-based multiple-access system for ultrastable frequency dissemination.
    • To evaluate the performance of this system over a 10-km single-mode fiber link.

    Main Methods:

    • Synchronization of optical pulse trains from an Er-fiber frequency comb using phase-conjugate stabilization.
    • Reproduction of the comb's repetition rate harmonic at arbitrary points along the fiber link.

    Main Results:

    • Achieved fractional frequency-transfer instability of 2.6×10⁻¹⁴ at 1 s and 4.9×10⁻¹⁷ at 10,000 s.
    • Demonstrated frequency instability of 4×10⁻¹⁴ at 1 s and 7×10⁻¹⁷ at 10,000 s for multiple-access testing.
    • Confirmed highly stable wideband microwave extraction capability.

    Conclusions:

    • The proposed frequency-comb-based multiple-access system offers a robust solution for ultrastable frequency dissemination.
    • This technology facilitates precise timing and frequency distribution over extended fiber networks.