RF-assisted coherent detection based continuous variable (CV) QKD with high secure key rates over atmospheric turbulence channels

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this invited paper, a high-speed continuous-variable quantum key distribution (CV-QKD) system is investigated in the presence of atmospheric turbulence, which is enabled by employing the wavelength, polarization, and orbital angular momentum (OAM) states as degrees of freedom. Four-state discrete modulation is used for the key shaping for the convenience of easy generation, as well as to enhance the reconciliation efficiency. The polarization insensitive atmospheric turbulence channel is emulated by two spatial light modulators (SLMs) on which randomly generated azimuthal phase patterns yielding Andrews' spectrum are recorded. The phase noise is mitigated by the phase noise cancellation (PNC) stage, and transmittance fluctuation is monitored directly by the D.C. component in the PNC stage. After system calibration, a total secret key rate (SKR) of 240 Mb/s can be reached in the presence of atmospheric turbulence.

Original languageEnglish (US)
Title of host publicationICTON 2017 - 19th International Conference on Transparent Optical Networks
PublisherIEEE Computer Society
ISBN (Electronic)9781538608586
DOIs
StatePublished - Sep 1 2017
Event19th International Conference on Transparent Optical Networks, ICTON 2017 - Girona, Catalonia, Spain
Duration: Jul 2 2017Jul 6 2017

Other

Other19th International Conference on Transparent Optical Networks, ICTON 2017
CountrySpain
CityGirona, Catalonia
Period7/2/177/6/17

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Keywords

  • atmospheric turbulence
  • continuous-variable quantum key distribution (CV-QKD)
  • discrete modulation
  • phase noise cancellation (PNC)
  • secret key rate (SKR)

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Qu, Z., & Djordjevic, I. B. (2017). RF-assisted coherent detection based continuous variable (CV) QKD with high secure key rates over atmospheric turbulence channels. In ICTON 2017 - 19th International Conference on Transparent Optical Networks [8024919] IEEE Computer Society. https://doi.org/10.1109/ICTON.2017.8024919