Maximization of rf-signal recovery in quantum microwave photonics systems

Authors:
raw_author_name: Yaqing Jin
raw_affiliation_string: Key Laboratory of Time Reference and Applications, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
raw_author_name: Ye Yang
raw_affiliation_string: State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; The 29th Research Institute of China Electronics Technology Group Corporation, Chengdu 610029, China
raw_author_name: Ruifang Dong
raw_affiliation_string: Hefei National Laboratory, Hefei 230088, China; Key Laboratory of Time Reference and Applications, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
raw_author_name: Xiao Xiang
raw_affiliation_string: Key Laboratory of Time Reference and Applications, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
raw_author_name: Runai Quan
raw_affiliation_string: Key Laboratory of Time Reference and Applications, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
raw_author_name: Huibo Hong
raw_affiliation_string: Key Laboratory of Time Reference and Applications, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
raw_author_name: Tao Liu
raw_affiliation_string: Hefei National Laboratory, Hefei 230088, China; Key Laboratory of Time Reference and Applications, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
raw_author_name: Mingtao Cao
raw_affiliation_string: Key Laboratory of Time Reference and Applications, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China
raw_author_name: Baihong Li
raw_affiliation_string: Department of Physics, Shaanxi University of Science and Technology, Xi’an 710021, China
raw_author_name: Xiaofei Zhang
raw_affiliation_string: Department of Physics, Shaanxi University of Science and Technology, Xi’an 710021, China
raw_author_name: Ming Li
raw_affiliation_string: School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
raw_author_name: Shougang Zhang
raw_affiliation_string: Hefei National Laboratory, Hefei 230088, China; Key Laboratory of Time Reference and Applications, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China

Abstract: Quantum microwave photonics (QMWP) technology, which harnesses energy-time-entangled biphotons as optical carriers and employs time-correlated single-photon detection for high-speed rf-signal recovery, has demonstrated remarkable potential in achieving nonlocal rf-signal coding and efficient rf-signal recovery from significant dispersion interference. In this paper, we expound on the principle of maximizing the recovered rf signals in QMWP systems. Through theoretical analysis and experimental validation, we establish a precise relationship between the recovered rf signal's magnitude, the input rf signal's frequency, involved dispersions, and the width of the coincidence selection window. This enables us to determine the optimal width for the coincidence selection window and the corresponding magnitude of the maximized rf signal given the dispersion. These findings offer valuable guidance for improving QMWP systems, thus expanding their potential applications.