| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Coherent Transfer of Optical Frequency over 112km with Instability at the 10$^{-20}$ Level |
| Xue Deng1,3, Jie Liu1,2,3, Dong-Dong Jiao1,3, Jing Gao1,3, Qi Zang1,2,3, Guan-Jun Xu1,3, Rui-Fang Dong1,3, Tao Liu1,3**, Shou-Gang Zhang1,3 |
1National Time Service Centre, Chinese Academy of Sciences, Xi'an 710600
2University of Chinese Academy of Sciences, Beijing 100049
3Key Laboratory of Time and Frequency Standards, Chinese Academy of Sciences, Xi'an 710600
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| Cite this article: |
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Xue Deng, Jie Liu, Dong-Dong Jiao et al 2016 Chin. Phys. Lett. 33 114202 |
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Abstract We demonstrate optical-carrier transfer over a 112-km single-span urban fiber link. By actively compensating the phase noise induced along the fiber link, a noise suppression of 55 dB at 1 Hz is obtained. A fractional frequency instability of $2.5\times10^{-16}$ at 1 s is achieved, and reaching $7.5\times10^{-20}$ at 10000 s. The system is stable and able to run for a long time. This work will contribute to optical frequency distribution and remote comparison among atomic clocks.
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Received: 12 July 2016
Published: 28 November 2016
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| PACS: |
42.62.Eh
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(Metrological applications; optical frequency synthesizers for precision spectroscopy)
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42.79.Sz
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(Optical communication systems, multiplexers, and demultiplexers?)
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06.30.Ft
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(Time and frequency)
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| Fund: Supported by the Special Fund for Major Scientific Equipment and Instrument Development of the National Natural Science Foundation of China under Grant No 61127901, the National Natural Science Foundation of China under Grant Nos 10225417, 11273024, 61025023 and 91636101, the Young Scientists Fund of the National Natural Science Foundation of China under Grant No 11403031, the Key Deployment Project of the Chinese Academy of Sciences under Grant No KJZD-EW-W02, the Strategic Priority Research Program of the Chinese Academy of Sciences under Grant No XDB21030800, and the National Key Research and Development Program of China under Grant Nos 2016YFF0200200 and 2016YFF0200205. |
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