Robust free-space optical frequency transfer in time-varying link distances conditions
Zhou Tong(童周)1,2, Lei Liu(刘雷)2, Jia-Liang Wang(王家亮)2, Qian Cao(操前)2, Zhi-Cheng Jin(金志成)2, Kang Ying(应康)4, Shen-Sheng Han(韩申生)2,3,5, Zheng-Fu Han(韩正甫)1, and You-Zhen Gui(桂有珍)2,3,†
1 School of Physical Sciences, University of Science and Technology of China, Hefei 230000, China; 2 Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; 3 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; 4 Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; 5 Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
Abstract Future inter-satellite clock comparison on high orbit will require optical time and frequency transmission technology between moving objects. Here, we demonstrate robust optical frequency transmission under the condition of variable link distance. This variable link is accomplished by the relative motion of a single telescope fixed on the experimental platform to a corner-cube reflector (CCR) installed on a sliding guide. Two acousto-optic modulators with different frequencies are used to separate forward signal from backward signal. With active phase noise suppression, when the CCR moves back and forth at a constant velocity of 20 cm/s and an acceleration of 20 cm/s2, we achieve the best frequency stability of 1.9×10-16 at 1 s and 7.9×10-19 at 1000 s indoors. This work paves the way for future studying optical frequency transfer between ultra-high-orbit satellites.
Received: 27 August 2023
Revised: 03 October 2023
Accepted manuscript online: 26 October 2023
PACS:
06.30.Ft
(Time and frequency)
Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2020YFB0408300), the National Natural Science Foundation of China (Grant No. 62175246), the Natural Science Foundation of Shanghai, China (Grant No. 22ZR1471100), the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. YIPA2021244), and the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0300701).
Zhou Tong(童周), Lei Liu(刘雷), Jia-Liang Wang(王家亮), Qian Cao(操前), Zhi-Cheng Jin(金志成), Kang Ying(应康), Shen-Sheng Han(韩申生), Zheng-Fu Han(韩正甫), and You-Zhen Gui(桂有珍) Robust free-space optical frequency transfer in time-varying link distances conditions 2024 Chin. Phys. B 33 020601
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