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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 38,
  • Issue 8,
  • pp. 2214-2218
  • (2020)

Wavelength Division Multiplexing of 194 Continuous Variable Quantum Key Distribution Channels

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Abstract

We demonstrate the first continuous variable quantum key distribution (CV-QKD) system with fully digital phase and polarization tracking, enabling the first wavelength division multiplexing experiment for CV-QKD. We transmit 194 × 0.5 GHz channels with 25 GHz channel spacing, demonstrating an aggregate estimated asymptotic secret key rate of 172.6 Mbit/s over 25 km.

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