Abstract:
With the wide-ranging and deepening application of high-precision time and frequency in various fields, there is a growing demand for remote time traceability. In order to achieve high precision and high stability in long-range time traceability, this paper proposes using optical fiber time-frequency links to realize remote reproduction of high-precision time references. Furthermore, the atomic clock taming method is optimized using a variable speed integral PID control strategy. The time reference recurrence scheme is verified for the link between the National Institute of Metrology Hepingli campus and the Changping campus, spanning 54 km. The experimental results demonstrate that the absolute value of more than 85% of the remote reproduction time deviation is better than 0.3 ns, and the remote reproduction time stability is better than 6 ps/d. The stability of remote reproduction frequency is better than 5×10
−16/d.