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15 December 2022 The SNR characteristics of quantum microwave photonics in radio-over-fiber systems
Yaqing Jin, Ye Yang, Huibo Hong, Xiao Xiang, Runai Quan, Tao Liu, Shougang Zhang, Ming Li, Ruifang Dong
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Proceedings Volume 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022); 124783K (2022) https://doi.org/10.1117/12.2654839
Event: Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 2022, Xi'an, China
Abstract
The quantum microwave photonics in radio-over-fiber (QMWP-RoF) systems has been recently demonstrated with a time-energy entangled biphoton source as the optical carrier combined with the single-photon detection technique. The results showed that the QMWP-RoF can realize the nonlocal recovery of the RF modulation from the unmodulated signal photons. Moreover, the RF modulation on the dispersed idler photons can be distilled. In this letter, we further investigate the SNRs of the recovered RF modulation as a function of the temporal selection window on the coincidence distribution of the biphotons. According to the investigation, the highest SNR of the nonlocally recovered RF modulation from the non-dispersed signal photons is achieved when the selection temporal width on the photon approaches the FWHM of the coincidence distribution, which may experience broadening due to the dispersion. On the other hand, the highest SNR of the distilled RF modulation from the dispersed idler photons is achieved at a fixed temporal width regardless of the dispersion effect. The results provide a guideline for optimizing the QMWP-RoF system under different dispersive conditions, which can better illustrate the resistance of the dispersion.
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Yaqing Jin, Ye Yang, Huibo Hong, Xiao Xiang, Runai Quan, Tao Liu, Shougang Zhang, Ming Li, and Ruifang Dong "The SNR characteristics of quantum microwave photonics in radio-over-fiber systems", Proc. SPIE 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 124783K (15 December 2022); https://doi.org/10.1117/12.2654839
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KEYWORDS
Photons
Dispersion
Signal to noise ratio
Frequency modulation
Microwave photonics
Radio over Fiber
Single photon detectors
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