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28 March 2024 |
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113 km Free-Space Time-Frequency Dissemination at the 19th Decimal Instability | Qi Shen
; Jian-Yu Guan
; Ji-Gang Ren
; Ting Zeng
; Lei Hou
; Min Li
; Yuan Cao
; Jin-Jian Han
; Meng-Zhe Lian
; Yan-Wei Chen
; Xin-Xin Peng
; Shao-Mao Wang
; Dan-Yang Zhu
; Xi-Ping Shi
; Zheng-Guo Wang
; Ye Li
; Wei-Yue Liu
; Ge-Sheng Pan
; Yong Wang
; Zhao-Hui Li
; Jin-Cai Wu
; Yan-Yan Zhang
; Fa-Xi Chen
; Chao-Yang Lu
; Sheng-Kai Liao
; Juan Yin
; Jian-Jun Jia
; Cheng-Zhi Peng
; Hai-Feng Jiang
; Qiang Zhang
; Jian-Wei Pan
; | Date: |
22 Mar 2022 | Abstract: | Optical clock networks play important roles in various fields, such as
precise navigation, redefinition of "second" unit, and gravitational tests. To
establish a global-scale optical clock network, it is essential to disseminate
time and frequency with a stability of $10^{-19}$ over a long-distance
free-space link. However, such attempts were limited to dozens of kilometers in
mirror-folded configuration. Here, we take a crucial step toward future
satellite-based time-frequency disseminations. By developing the key
technologies, including high-power frequency combs, high-stability and
high-efficiency optical transceiver systems, and efficient linear optical
sampling, we demonstrate free-space time-frequency dissemination over two
independent links with femtosecond time deviation, $3 imes10^{-19}$ at 10,000
s residual instability and $1.6 imes10^{-20}pm 4.3 imes10^{-19}$ offset.
This level of the stability retains for an increased channel loss up to 89 dB.
Our work can not only be directly used in ground-based application, but also
firmly laid the groundwork for future satellite time-frequency dissemination. | Source: | arXiv, 2203.11272 | Services: | Forum | Review | PDF | Favorites |
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