Time traceability of BeiDou system based on microwave-optical entanglement

Yongfei Liu; Chunyan Yang; Luhan Zhao; Yongqing Wang

doi:10.1117/12.2645978

23 January 2023 Time traceability of BeiDou system based on microwave-optical entanglement

Yongfei Liu, Chunyan Yang, Luhan Zhao, Yongqing Wang

Proceedings Volume 12557, AOPC 2022: Optical Sensing, Imaging, and Display Technology; 125572V (2023) https://doi.org/10.1117/12.2645978
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

Due to the limitation of the measurement accuracy of classical radio signals, the time comparison accuracy can only reach ns level. In this paper, a time comparison scheme of BeiDou system based on microwave-optical entangled signal is proposed, which effectively combines the long-distance transmission advantage of microwave signal with the single photon detection advantage of optical signal by electro-opto-mechanical converter, and the phase difference is solved by a phase conjugate processor ,so as to calculate the accurate time difference information. Through theoretical analysis and simulation, it is proved that even if the quantum signal is under the condition of low entanglement degree, the proposed scheme can improve the time comparison accuracy to the ps level.

Citation Download Citation

Yongfei Liu, Chunyan Yang, Luhan Zhao, and Yongqing Wang "Time traceability of BeiDou system based on microwave-optical entanglement", Proc. SPIE 12557, AOPC 2022: Optical Sensing, Imaging, and Display Technology, 125572V (23 January 2023); https://doi.org/10.1117/12.2645978

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