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Related Experiment Video

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Large-dynamic-range time pre-compensation scheme for fiber optic time transfer.

Longqiang Yu, Rong Wang, Lin Lu

    Applied Optics
    |February 25, 2017
    PubMed
    Summary

    This study presents a novel transmission delay compensation scheme for precise fiber-optic time transfer. The system effectively compensates for large and abrupt variations in fiber-optic transmission delay.

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    Area of Science:

    • Optics and Photonics
    • Telecommunications Engineering
    • Metrology

    Background:

    • Precise time transfer is crucial for modern networks and scientific applications.
    • Fiber-optic links often experience variable transmission delays due to environmental factors and network dynamics.
    • Existing compensation methods may have limited dynamic range, hindering applications with significant delay fluctuations.

    Purpose of the Study:

    • To experimentally demonstrate a novel transmission delay compensation scheme for precise fiber-optic time transfer.
    • To validate the effectiveness of the scheme in compensating for both continuous drifts and abrupt changes in transmission delay.
    • To assess the suitability of the scheme for high-dynamic fiber-optic time transfer links.

    Main Methods:

    • Development of a compensation scheme utilizing a clock counter and an electronic variable delay line.
    • Experimental testing across three optical fiber links of varying lengths.
    • Induction and compensation of significant, large-dynamic transmission delay variations, including continuous drifts and abrupt hops.

    Main Results:

    • Successful experimental demonstration of the transmission delay compensation scheme.
    • Effective compensation of both continuous drifts and abrupt hops in transmission delay across different fiber link lengths.
    • Achieved compensation for transmission delay variations significantly larger than previously reported cases.

    Conclusions:

    • The developed scheme offers an unlimited theoretical compensation range for transmission delay.
    • The large-dynamic compensation capability makes it highly suitable for fiber-optic time transfer links with substantial delay variations.
    • This advancement enables more robust and precise time synchronization in challenging network environments.