Institutional Repository of Optical Astronomy Research Laboratory
| Free-space dissemination of time and frequency with 10(-19) instability over 113 km | |
Shen, Qi1,2,3,4; Guan, Jian-Yu1,2,3,4; Ren, Ji-Gang1,2,3,4; Zeng, Ting1,2,3,4; Hou, Lei1,2,3,4; Li, Min1,2,3,4; Cao, Yuan1,2,3,4; Han, Jin-Jian1,2,3,4; Lian, Meng-Zhe1,2,3,4; Chen, Yan-Wei1,2,3,4; Peng, Xin-Xin1,2,3,4; Wang, Shao-Mao1,2,3,4; Zhu, Dan-Yang1,2,3,4; Shi, Xi-Ping5; Wang, Zheng-Guo1,2,3,4; Li, Ye5; Liu, Wei-Yue5; Pan, Ge-Sheng1,2,3,4; Wang, Yong6 ; Li, Zhao-Hui7; Wu, Jin-Cai4,7; Zhang, Yan-Yan8; Chen, Fa-Xi9; Lu, Chao-Yang1,2,3,4; Liao, Sheng-Kai1,2,3,4; Yin, Juan1,2,3,4; Jia, Jian-Jun1; Peng, Cheng-Zhi1,2,3,4; Jiang, Hai-Feng1,2,3,4; Zhang, Qiang1,2,3,4,7,9; Pan, Jian-Wei1,2,3,4
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| 2022-10-27 | |
| Source Publication | NATURE
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| ISSN | 0028-0836 |
| Volume | 610Issue:7933Pages:661-+ |
| Contribution Rank | 5 |
| Abstract | Networks of optical clocks find applications in precise navigation(1,2), in efforts to redefine the fundamental unit of the 'secone(3-6) and in gravitational tests(7). As the frequency instability for state-of-the-art optical clocks has reached the 10(-19) levels(8,9), the vision of a global-scale optical network that achieves comparable performances requires the dissemination oftime and frequency over a long-distance free-space link with a similar instability of 10(-19). However, previous attempts at free-space dissemination oftime and frequency at high precision did not extend beyond dozens of kilometres(10,11). Here we report time-frequency dissemination with an offset of 6.3 x 10(-20)+/- 3.4 x 10(-19) and an instability oflessthan 4 x 10(-19) at 10,000 sthrough a free-space link of113 km. Key technologies essential to this achievement include the deployment of high-power frequency combs, high-stability and high-efficiency optical transceiver systems and efficient linear optical sampling. We observe that the stability we have reached is retained for channel losses up to 89 dB. The technique we report can not only be directly used in ground-based applications, but could also lay the groundwork for future satellite time-frequency dissemination. |
| DOI | 10.1038/s41586-022-05228-5 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | OPTICAL CLOCKS ; FIBER LINK |
| Funding Project | National Key Research and Development Programme of China[2017YFA0303900] ; National Key Research and Development Programme of China[2020YFA0309800] ; National Key Research and Development Programme of China[2020YFC2200103] ; Strategic Priority Research Programme of Chinese Academy of Sciences[XDB35030000] ; Strategic Priority Research Programme of Chinese Academy of Sciences[XDA15020400] ; National Natural Science Foundation of China[T2125010] ; National Natural Science Foundation of China[61825505] ; Anhui Initiative in Quantum Information Technologies[AHY010100] ; Key R&D Plan of Shandong Province[2020CXGC010105] ; Key R&D Plan of Shandong Province[2021ZDPT01] ; Key Research and Development Programme of Guangdong Province[2018B030325001] ; Shanghai Municipal Science and Technology Major Project[2019SHZDZX01] ; Innovation Programme for Quantum Science and Technology[2021ZD0300100] |
| WOS Research Area | Science & Technology - Other Topics |
| WOS Subject | Multidisciplinary Sciences |
| WOS ID | WOS:000864094100011 |
| Publisher | NATURE PORTFOLIO |
| Funding Organization | National Key Research and Development Programme of China ; Strategic Priority Research Programme of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Anhui Initiative in Quantum Information Technologies ; Key R&D Plan of Shandong Province ; Key Research and Development Programme of Guangdong Province ; Shanghai Municipal Science and Technology Major Project ; Innovation Programme for Quantum Science and Technology |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4934 |
| Collection | 光学天文与技术应用研究室 |
| Corresponding Author | Jiang, Hai-Feng; Zhang, Qiang; Pan, Jian-Wei |
| Affiliation | 1.Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci, Microscale & Sch Phys Sci, Hefei, Peoples R China 2.Univ Sci & Technol China, Shanghai Res Ctr Quantum Sci, Shanghai, Peoples R China 3.Univ Sci & Technol China, CAS Ctr Excellence Quantum Informat & Quantum Phy, Shanghai, Peoples R China 4.Univ Sci & Technol China, Hefei Natl Lab, Hefei, Peoples R China 5.Ningbo Univ, Fac Informat Sci & Engn, Ningbo, Peoples R China 6.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi, Peoples R China 7.Chinese Acad Sci, Shanghai Inst Tech Phys, Key Lab Space Act Optoelect Technol, Shanghai, Peoples R China 8.Chinese Acad Sci, Natl Time Serv Ctr, Key Lab Time & Frequency Primary Stand, Xian, Peoples R China 9.Jinan Inst Quantum Technol, Jinan, Peoples R China |
| Recommended Citation GB/T 7714 | Shen, Qi,Guan, Jian-Yu,Ren, Ji-Gang,et al. Free-space dissemination of time and frequency with 10(-19) instability over 113 km[J]. NATURE,2022,610(7933):661-+. |
| APA | Shen, Qi.,Guan, Jian-Yu.,Ren, Ji-Gang.,Zeng, Ting.,Hou, Lei.,...&Pan, Jian-Wei.(2022).Free-space dissemination of time and frequency with 10(-19) instability over 113 km.NATURE,610(7933),661-+. |
| MLA | Shen, Qi,et al."Free-space dissemination of time and frequency with 10(-19) instability over 113 km".NATURE 610.7933(2022):661-+. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Shen-2022-Free-space（2906KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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