Real-time Disciplining of Rubidium Clock for Remote Time Traceability with Two Way Optical Fiber Time and Frequency Transfer
FANG Wei1,2,5,6, JIN Shang-zhong2,3,CHEN De-hao5,6,LIANG Kun4,5,6
1.Zhejiang Province Institute of Metrology, Zhejiang, Hangzhou 310018,China
2.School of Optical and Electronic Technology, China Jiliang University,Zhejiang, Hangzhou 310018,China
3. International Technology Cooperation Base for Micro-Nano Fabricationand Optoelectronic Inspection, Zhejiang,
Hangzhou 310018, China
4.School of Electronic and InformationEngineering, Beijing Jiaotong University, Beijing 100044,China
5. Division of Time and Frequency Metrology, National Institute of Metrology,Beijing 100029, China
6. National Time and Frequency Metrology Center, Beijing 100029, China
Abstract To improve the remote time traceability performance of the rubidium atomic clock, the high-precision quasi-real-time disciplining experiments were implemented on the rubidium atomic clock based on the TWOTFT links of National Institute of Metrology (NIM). In the experiment, the disciplining intervals are 16min, 5min, and 1min, which realizes the verification of the principle of remote time traceability based on TWOTFT. The experimental results show that in remote time traceability, TWOTFT is more effective than GNSS time-frequency transfer, and the remote time traceability effect with a disciplining interval of 1 minute is the best, and 98.67% of the absolute values of the time differences are within 0.5ns, and the time stability and frequency stability are 2.5×10-11s·d-1 and 5.0×10-16d-1 respectively.
FANG Wei,JIN Shang-zhong,CHEN De-hao, et al. Real-time Disciplining of Rubidium Clock for Remote Time Traceability with Two Way Optical Fiber Time and Frequency Transfer[J]. Acta Metrologica Sinica, 2022, 43(4): 542-546.
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2022, Vol. 43 
