Abstract：In order to meet the demand of high-precision remote traceability, a remote traceability system based on optical fiber was designed and implemented. The system traced the time of the local source to the remote high-benchmark time source based on the high precision and high stability of two-way time transfer via optical fiber, and also adopted the dual backup mechanism of primary and standby circuits to ensure its reliability. Experiment showed that the system can achieve the traceability effect with the time difference less than 2ns and the daily frequency stability within 7×10-15. Meanwhile, based on the time synchronization technology, the system can control the time difference between the primary and standby circuits within 0.5ns.
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2021, Vol. 42 
