Chinese Journal of Quantum Electronics, Volume. 36, Issue 6, 709(2019)

Terminal noise filtration of hydrogen clock signal after transmission

Bowen YAO1,2、*, Huanyao SUN1, and Qunfeng CHEN1
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • show less

    The low phase-noise and high frequency-stability 10 MHz hydrogen clock signal (HCS) is the indispensable microwave frequency reference for physics experiments of precision measurement. After transmitted over a certain distance, the phase noise and short-term stability of the HCS will be downgraded due to the disturbance of the external electromagnetic noise and vibration. A scheme to filter the terminal noise of the HCS after transmission is introduced, which reduces the phase noise and improves the short-term stability of the HCS. The scheme is based on phase-locking of an oven-controlled crystal oscillator (OCXO) to the HCS, the phase noise and frequency stability of the reference signal at shorter than 1 s is defined by the OCXO, while the long-term stability follows the HCS. After the filtering scheme, the power of the HCS is amplified from -4.4 dBm to 5 dBm, the terminal phase noise background of the HCS is reduced about 10 dB, and all disturbance higher than 1 Hz are eliminated. The system can dramatically purify the HCS without changing the laboratory hydrogen clock and the HCS transmitting network, and then the accuracy of precision measurement experiment is improved.

    Tools

    Get Citation

    Copy Citation Text

    YAO Bowen, SUN Huanyao, CHEN Qunfeng. Terminal noise filtration of hydrogen clock signal after transmission[J]. Chinese Journal of Quantum Electronics, 2019, 36(6): 709

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category:

    Received: Mar. 5, 2019

    Accepted: --

    Published Online: Dec. 6, 2019

    The Author Email: Bowen YAO (1783324062@qq.com)

    DOI:10.3969/j.issn.1007-5461. 2019.06.011

    Topics