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.
方维,金尚忠,陈德好,梁坤. 基于光纤双向时间传递实时驯服铷钟的远程时间溯源[J]. 计量学报, 2022, 43(4): 542-546.
FANG Wei,JIN Shang-zhong,CHEN De-hao,LIANG Kun. Real-time Disciplining of Rubidium Clock for Remote Time Traceability with Two Way Optical Fiber Time and Frequency Transfer. Acta Metrologica Sinica, 2022, 43(4): 542-546.
［1］ 林弋戈,梁坤,方占军. 时间单位—秒的演进［J］. 中国计量, 2018(8):16-17.
Lin Y G, Liang K, Fang Z J. Unit of time—Evolution of seconds［J］. China Metrology,2018( 8) : 16-17.
［2］ 马爱文,曲兴华.SI基本单位量子化重新定义及其意义［J］.计量学报, 2020,41(2): 129-133.
Ma A W, Q u X H. The Quantized Redefinition of the SI and its Signification［J］. Acta Metrologica Sinica, 2020,41(2): 129-133.
［3］ 袁通, 高厚磊, 徐彬,等. 5G高精度时间同步及在电网中的应用模式研究［J］. 电力信息与通信技术, 2020,(8):47-53.
Yuan T, Gao H L, Xu L, et al. Research on 5G High-Precision Time Sychronization and its Application Mode in Power Grid［J］. Electric Power Information and Communication Technology, 2020,(8) :47-53.
［4］ 龙波, 王菊凤, 黄徐瑞晗,等. 基于NIMDO及光纤传递的高精度时间同步系统研究［J］. 计量学报, 2019, 40(5):904-909.
Long B, Wang J F, Huang X R H, et al. Study of High Precision Time Synchronization System Based on NIMDO and Optical Fiber Transfer［J］. Acta Metrologica Sinica, 2019, 40(5):904-909.
［5］ 杨志强,梁坤,张爱敏, 等.卫星双向时间频率比对软件接收技术研究［J］.计量学报,2021,42(12): 1658-1664.
Yang Z Q, Liang K, Zhang A M, et al. Research of Software Designed Receiver on Two Way Satellite Time and Frequency Transfer［J］. Acta Metrologica Sinica, 2021,42(12): 1658-1664.
［6］ Liang K, Zuo F, Pei C, et al. Real-Time Remote Calibration (RTRC) System for Time and Frequency［C］//Proceedings of IFCS-EFTF. Prague, Czech Republic, 2013.
［7］ 龙波, 尤捷雯, 张宇,等. 基于NIMDO的远程时间频率溯源［J］. 计量与测试技术, 2019, 46(8):9-11.
Long B, You J W, Zhang Y, et al. Remote Traceability of Time and Frequency Based on NIMDO［J］. Metrology & Measurement Technique, 2019, 46(8):9-11.
［8］ Liang K, Chen Q Y, Han K, et al. Replicating UTC(NIM) remotely for Time and Frequency Traceability［J］. IJEE, 2019,26(4):147-155.
［9］ Zhang P, Tu R, Zhang R, et al. Combining GPS, BeiDou, and Galileo Satellite Systems for Time and Frequency Transfer Based on Carrier Phase Observations［J］. Remote Sensing, 2018, 10(2):324.
［10］ 武文俊. 卫星双向时间频率传递的误差研究［D］. 西安:中国科学院国家授时中心, 2012.
［11］ 王晔. 基于GNSS共视的远程时间频率溯源的性能提升方法研究［D］. 北京:北京交通大学, 2018.
［12］ 韩凯. 基于光纤的频率传递及远程时间频率溯源方法研究［D］. 北京:北京交通大学, 2019.
［13］ Rost M, Piester D, Yang W, Feldmann T, W¨ubbena T and Bauch A. Time transfer through optical fibers over a distance of 73 km with an uncertainty below 100 ps［J］. Metrologia, 2012, 49(6): 772-778.
［14］ Lopez O, Kanj A, Pottie P E, et al. Simultaneous remote transfer of accurate timing and optical frequency over a public fiber network［J］. Applied Physics B, 2013, 110(1):3-6.
［15］ Liang K, Zhang A, Yang Z, et al. Preliminary time transfer through optical fiber at NIM［C］//Proceedings of 2015 Joint Conference of the IEEE International Frequency Control Symposium & the European Frequency and Time Forum. Denver, CO, USA, 2015.
［16］ Liang K,Hang Y,Fei Z, et al. Disciplined Oscillator System by UTC(NIM) for Remote Time and Frequency Traceability［C］//Proceedings of EFTF. Neuchatel, Switzerland, 2014.
［17］ 高小珣, 高源, 张越,等. GPS共视法远距离时间频率传递技术研究［J］. 计量学报, 2008, 29(1):80-83.
Gao X X, Gao Y, Zhang Y, et al. GPS Common View Method for Remote Time and Frequency Transfer ［J］. Acta Metrologica Sinica, 2008, 29(1): 80-23.
2022, Vol. 43 
