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July 20, 2026
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Polarization extinction ratio conversion due to pointing system impact in satellite quantum key distribution

St. Petersburg Polytechnical University Journal: Physics and Mathematics. 2024. Vol. 17. No. 3.2. P. 88–92.
Duplinsky A.V., Khmelev A. V., Bakhshaliev R. M., Sevryukov D. O., Barbyshev K. A., Kurochkin V. L.

Quantum key distribution via satellites enables the technology to be applied at transcontinental scale; nevertheless, in contrast to fiber systems, using a free-space optical communication channel presents certain extra technological obstacles. The contribution of the acquisition, pointing and tracking system’s operation to the potential quantum bit error value is investigated in this research. The polarization extinction ratio measurements varying with the pointing mirror angular position are reported, based on these data, the upper limit of the quantum bit error is predicted for several types of satellite passages

Research target: Engineering and Technology
Language: English
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Text on another site
Keywords: quantum key distribution, atmospheric optical communication lines, FSO, decoy-state BB84 protocol, polarization coding.квантовое распределение ключей, атмосферные оптические линии связи, протокол decoy- state BB84, поляризационное кодирование.
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