Dual-comb-enhanced microwave clock synchronization over commercial fiber
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913507459465216 |
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| author | Chen, Ziyang Yu, Dongrui Lu, Ganbin Zhang, Yufei Yu, Song Luo, Bin Guo, Hong |
| author_facet | Chen, Ziyang Yu, Dongrui Lu, Ganbin Zhang, Yufei Yu, Song Luo, Bin Guo, Hong |
| contents | The large-scale clock network is the key ingredient to obtain high precision in many scenarios, from fundamental research to cutting-edge applications. The advantage of the time synchronization among microwave clocks is their cost, size, and accessibility. Here, we demonstrate a femtosecond-level time synchronization of microwave clocks through a commercial link of 205.86 km via dual-comb-enhanced optical two-way time transfer, which achieves a 6.23-fs residual time deviation between synchronized timescales at 1 s and an instability below 6E-18 at 10,000 s. Further, the high-precision time synchronization of microwave clocks significantly enhances the probe ability of subtle reciprocity changes of fiber to the sub-picosecond level. This work provides a path toward secure fiber time-frequency networks to support future microwave-clock-based precise timing and sensing systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_09535 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dual-comb-enhanced microwave clock synchronization over commercial fiber Chen, Ziyang Yu, Dongrui Lu, Ganbin Zhang, Yufei Yu, Song Luo, Bin Guo, Hong Optics Instrumentation and Detectors The large-scale clock network is the key ingredient to obtain high precision in many scenarios, from fundamental research to cutting-edge applications. The advantage of the time synchronization among microwave clocks is their cost, size, and accessibility. Here, we demonstrate a femtosecond-level time synchronization of microwave clocks through a commercial link of 205.86 km via dual-comb-enhanced optical two-way time transfer, which achieves a 6.23-fs residual time deviation between synchronized timescales at 1 s and an instability below 6E-18 at 10,000 s. Further, the high-precision time synchronization of microwave clocks significantly enhances the probe ability of subtle reciprocity changes of fiber to the sub-picosecond level. This work provides a path toward secure fiber time-frequency networks to support future microwave-clock-based precise timing and sensing systems. |
| title | Dual-comb-enhanced microwave clock synchronization over commercial fiber |
| topic | Optics Instrumentation and Detectors |
| url | https://arxiv.org/abs/2404.09535 |