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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. 2026. Vol. 17. No. 3. P. 88–92.
Дуплинский А. В., Khmelev A. V., Бахшалиев Р. М., Севрюков Д. О., Barbyshev K. A., Kurochkin V. L.
Quantum key distribution via satellites enables the technology to be applied attranscontinental scale; nevertheless, in contrast to fiber systems, using a free-space opticalcommunication channel presents certain extra technological obstacles. The contribution of theacquisition, pointing and tracking system’s operation to the potential quantum bit error valueis investigated in this research. The polarization extinction ratio measurements varying withthe pointing mirror angular position are reported, based on these data, the upper limit of thequantum bit error is predicted for several types of satellite passages.
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