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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Multipoint joint time and frequency dissemination in delay-stabilized fiber optic links
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Multipoint joint time and frequency dissemination in delay-stabilized fiber optic links

机译：延迟稳定的光纤链路中的多点联合时间和频率传播

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摘要

This paper presents the system for dissemination of both the RF frequency (e.g., 5, 10, or 100 MHz) and time (pulse per second) signals using an actively tapped fiber-optic link with electronic stabilization of the propagation delay. In principle several nodes for accessing the time/frequency signals may be added without the degradation of the dissemination in the main link. We are discussing the algorithm of determining the propagation delay from the local end of the link to the access node that is required for calibration of the time dissemination. Performed analysis shows that the uncertainty of the time calibration at the access node may in practice be dominated by the dependence of the propagation delay of the receivers on impinging optical powers and is only weakly affected by the distance between the local and access modules. The uncertainty is, however, still low, being only about two times higher compared with the calibration uncertainty of the main link. Experimental results performed on several spooled fibers show that the accuracy of described calibration procedures, expressed as a difference from the results of direct measurement, is not worse than 35 ps.
机译：本文介绍了一种系统，该系统使用有源抽头的光纤链路来传播射频频率（例如5、10或100 MHz）和时间（每秒脉冲）信号，并具有电子稳定的传播延迟。原则上，可以增加几个访问时间/频率信号的节点，而不会降低主链路中的传播。我们正在讨论确定时间链路校准所需的从链路本地端到接入节点的传播延迟的算法。进行的分析表明，接入节点上时间校准的不确定性实际上可能是受接收器传播延迟对入射光功率的依赖性所支配的，并且仅受本地和接入模块之间距离的影响很小。但是，不确定度仍然很低，仅比主链路的校准不确定度高两倍。在多根缠绕的纤维上进行的实验结果表明，所描述的校准程序的准确性（与直接测量结果的差异表示）不低于35 ps。

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