| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Time Transfer in a 1839-km Telecommunication Fiber Link Demonstrating a Picosecond-Scale Stability |
| Xinxing Guo1,2†, Bing'an Hou3†, Bo Liu1,2, Fan Yang3, Weicheng Kong1,2, Tao Liu1,2,4*, Ruifang Dong1,2,4*, and Shougang Zhang1,2,4* |
1Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China
2School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
3Sichuan Taifu Ground Beidou Technology Co., Ltd, Chengdu 610093, China
4Hefei National Laboratory, Hefei 230088, China
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| Cite this article: |
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Xinxing Guo, Bing'an Hou, Bo Liu et al 2024 Chin. Phys. Lett. 41 064202 |
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Abstract An implementation of high-precision time transfer over a 1839-km field fiber loop back link between two provincial capitals of China, Xi'an and Taiyuan, is reported. Time transfer stabilities of 6.5 ps at averaging time of 1 s and 4.6 ps at 40000 s were achieved. The uncertainty for the time transfer system was evaluated, showing a budget of 56.2 ps. These results stand for a significant milestone in achieving high-precision time transfer over a field fiber link spanning thousands of kilometers, signifying a record-breaking achievement for the real-field time transfer in both stability and distance, which paves the way for constructing the nationwide high-precision time service via fiber network.
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Received: 14 February 2024
Published: 20 June 2024
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| PACS: |
07.60.Vg
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(Fiber-optic instruments)
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06.30.-k
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(Measurements common to several branches of physics and astronomy)
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42.81.Uv
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(Fiber networks)
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06.30.Ft
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(Time and frequency)
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