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Related Experiment Video

Updated: Oct 3, 2025

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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Published on: January 7, 2019

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Fiber-optic joint time and frequency transmission with enhanced time precision.

Faxing Zuo, Qi Li, Kunfeng Xie

    Optics Letters
    |February 15, 2022
    PubMed
    Summary

    This study presents a novel method for high-precision joint time and frequency transmission over optical fiber. The system achieves enhanced time stability and accuracy, crucial for advanced communication networks.

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    Area of Science:

    • Optical communications
    • Precision timing systems

    Background:

    • Accurate time and frequency transfer are critical for modern networks.
    • Existing methods face limitations in stability and precision over long distances.

    Purpose of the Study:

    • To develop a high-precision joint time and frequency transmission scheme.
    • To achieve enhanced time stability and accuracy using optical fiber links.

    Main Methods:

    • Utilized bidirectional wavelength division multiplexing (WDM) for transmission.
    • Generated time signals from phase-stable frequency signals using a low-jitter event generator.
    • Implemented accurate two-way time comparison for master-slave synchronization.

    Main Results:

    • Demonstrated a joint time and frequency transmission system over a 62-km urban fiber link.
    • Achieved time stability with Time Deviation (TDEV) of 3.5 ps/s.
    • Realized time accuracy better than 20 ps, with long-term stability of 430 fs/10,000 s.

    Conclusions:

    • The proposed scheme enables high-precision time and frequency transfer.
    • The system offers enhanced time stability and accuracy suitable for demanding applications.
    • Successful experimental validation confirms the scheme's practical feasibility.