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NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2021, 12 (2), P. 161–166

Heterodyne-based subcarrier wave quantum cryptography under the chromatic dispersion impact

R. K. Goncharov – St. Petersburg National Research ITMO University, Kronverkskiy, 49, St. Petersburg, 197101, Russia; rkgoncharov@itmo.ru
A.V. Zinovev – St. Petersburg National Research ITMO University, Kronverkskiy, 49, St. Petersburg, 197101, Russia
F. D. Kiselev – St. Petersburg National Research ITMO University, Kronverkskiy, 49, St. Petersburg, 197101; Quanttelecom LLC, Vasilievsky island, 6 Line, 59, St. Petersburg, 199178, Russia
E. O. Samsonov – St. Petersburg National Research ITMO University, Kronverkskiy, 49, St. Petersburg, 197101; Quanttelecom LLC, Vasilievsky island, 6 Line, 59, St. Petersburg, 199178, Russia; eosamsonov@itmo.ru

In this paper, we investigate the effect of chromatic dispersion on a continuous variable quantum key distribution system with heterodyne detection, in which information is encoded in the sidebands of modulated laser radiation. We consider the system in which a balanced detector output is downconverted to an intermediate frequency and propose a non-standard methods of dispersion compensation using RF phase shifters.

Keywords: heterodyne detection, subcarrier wave, quantum key distribution, chromatic dispersion.

PACS 03.67.-a, 42.50.-p DOI 10.17586/2220-8054-2021-12-2-161-166

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