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<p>One of the approaches to enhance the performance of a subcarrier wave quantum communication system is to modify the underlying detection principles. In this study, we investigate heterodyne detection using a balanced photodetector as an alternative to a single-photon detector. A heterodyne detection scheme was implemented for a subcarrier wave quantum key distribution system. The experimental operation of this scheme was demonstrated, and measurements of the phase shift—which can be used to encode information—were carried out.</p>

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Heterodyne Detection for a Subcarrier Wave Quantum Key Distribution System

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • M. A. Fadeev,
  • P.A.Morozova,
  • S. V. Smirnov,
  • A. E. Ivanova,
  • S. M.Kynev,
  • V. V.Chistyakov

摘要

One of the approaches to enhance the performance of a subcarrier wave quantum communication system is to modify the underlying detection principles. In this study, we investigate heterodyne detection using a balanced photodetector as an alternative to a single-photon detector. A heterodyne detection scheme was implemented for a subcarrier wave quantum key distribution system. The experimental operation of this scheme was demonstrated, and measurements of the phase shift—which can be used to encode information—were carried out.