中国物理B ›› 2020, Vol. 29 ›› Issue (6): 64209-064209.doi: 10.1088/1674-1056/ab84d6

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Microwave frequency transfer over a 112-km urban fiber link based on electronic phase compensation

Wen-Xiang Xue(薛文祥), Wen-Yu Zhao(赵文宇), Hong-Lei Quan(全洪雷), Cui-Chen Zhao(赵粹臣), Yan Xing(邢燕), Hai-Feng Jiang(姜海峰), Shou-Gang Zhang(张首刚)   

  1. 1 National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China;
    2 Key Laboratory of Time and Frequency Primary Standards, Chinese Academy of Sciences, Xi'an 710600, China;
    3 School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2020-02-03 修回日期:2020-03-09 出版日期:2020-06-05 发布日期:2020-06-05
  • 通讯作者: Shou-Gang Zhang E-mail:szhang@ntsc.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61825505, 91536217, and 61127901).

Microwave frequency transfer over a 112-km urban fiber link based on electronic phase compensation

Wen-Xiang Xue(薛文祥)1,2,3, Wen-Yu Zhao(赵文宇)1,2, Hong-Lei Quan(全洪雷)1,2,3, Cui-Chen Zhao(赵粹臣)1,2,3, Yan Xing(邢燕)1,2, Hai-Feng Jiang(姜海峰)1,2, Shou-Gang Zhang(张首刚)1,2   

  1. 1 National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China;
    2 Key Laboratory of Time and Frequency Primary Standards, Chinese Academy of Sciences, Xi'an 710600, China;
    3 School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-02-03 Revised:2020-03-09 Online:2020-06-05 Published:2020-06-05
  • Contact: Shou-Gang Zhang E-mail:szhang@ntsc.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61825505, 91536217, and 61127901).

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摘要：

We demonstrate the transmission of a microwave frequency signal at 10 GHz over a 112-km urban fiber link based on a novel simple-architecture electronic phase compensation system. The key element of the system is the low noise frequency divider by 4 to differentiate the frequency of the forward signal from that of the backward one, thus suppressing the effect of Brillouin backscattering and parasitic reflection along the link. In terms of overlapping Allan deviation, the frequency transfer instability of 4.2×10-15 at 1-s integration time and 1.6×10-18 at one-day integration time was achieved. In addition, its sensitivity to the polarization mode dispersion in fiber is analyzed by comparing the results with and without laser polarization scrambling. Generally, with simplicity and robustness, the system can offer great potentials in constructing cascaded frequency transfer system and facilitate the building of fiber-based microwave transfer network.

关键词: microwave frequency transfer, phase compensation, polarization mode dispersion

Abstract:

We demonstrate the transmission of a microwave frequency signal at 10 GHz over a 112-km urban fiber link based on a novel simple-architecture electronic phase compensation system. The key element of the system is the low noise frequency divider by 4 to differentiate the frequency of the forward signal from that of the backward one, thus suppressing the effect of Brillouin backscattering and parasitic reflection along the link. In terms of overlapping Allan deviation, the frequency transfer instability of 4.2×10-15 at 1-s integration time and 1.6×10-18 at one-day integration time was achieved. In addition, its sensitivity to the polarization mode dispersion in fiber is analyzed by comparing the results with and without laser polarization scrambling. Generally, with simplicity and robustness, the system can offer great potentials in constructing cascaded frequency transfer system and facilitate the building of fiber-based microwave transfer network.

Key words: microwave frequency transfer, phase compensation, polarization mode dispersion

中图分类号:  (Metrological applications; optical frequency synthesizers for precision spectroscopy)

  • 42.62.Eh
42.79.Sz (Optical communication systems, multiplexers, and demultiplexers?) 06.30.Ft (Time and frequency) 42.81.Uv (Fiber networks)