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Coherent detection schemes for subcarrier wave continuous variable quantum key distribution

E. Samsonov, R. Goncharov, M. Fadeev, A. Zinoviev, D. Kirichenko, B. Nasedkin, A. D. Kiselev, and V. Egorov

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Abstract

We examine different methods to implement coherent detection in subcarrier wave quantum key distribution (SCW QKD) systems. For classical wave fields, we present the models describing homodyne-type and heterodyne-type coherent detection schemes needed to extract information from the quadrature phase-coded multimode signals used in SCW QKD. Practical feasibility of the proposed schemes is corroborated by experiments.

© 2021 Optical Society of America

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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