All-Digital Radio-Frequency Signal Distribution Via Optical Fibers

All-Digital Radio-Frequency Signal Distribution Via Optical Fibers
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DOI:
10.1109/lpt.2012.2193389
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发表时间:
2012-06-15
影响因子:
2.6
通讯作者:
Gray, Malcolm B.
Gray, Malcolm B.
中科院分区:
工程技术3区
文献类型:
--
作者:
Hsu, Magnus T. L.;He, Yabai;Gray, Malcolm B.

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我们提出了一个射频(RF)信号通过光纤分配系统。我们利用一个全数字平台,包括锁相环,数控振荡器,光纤相位噪声消除系统。我们的系统在1 s时实现了4x 10(-13)的分数频率传输稳定性,在一天内实现了6x 10(-17)的RF信号在70 km光纤上的分布。我们证明,这种性能可以实现与标准的晶体振荡器。我们的系统是可扩展的,可配置的,灵活的,允许在不同的频率分布的信号,同时保持超过两个数量级的光纤相位噪声抑制。
We present a radio-frequency (RF) signal distribution system via optical fibers. We utilize an all-digital platform that encompasses a phase-locked loop, numerically-controlled oscillator, and fiber phase noise cancellation system. Our system achieves a fractional frequency transfer stability of 4x10(-13) at 1 s and 6 x 10(-17) at one day for the distribution of RF signals over 70 km of optical fiber. We demonstrate that this performance can be achieved with standard crystal oscillators. Our system is scalable, configurable, and flexible, allowing distribution of signals at different frequencies while maintaining over two orders of magnitude of the fiber phase noise suppression.