Co-propagation of Classical and Continuous-variable QKD Signals over a Turbulent Optical Channel with a Real-time QKD Receiver

João dos Reis Frazão, Vincent van Vliet,Sjoerd van der Heide,Menno van den Hout,Kadir Gümüş, Aaron Albores-Mejía, Boris Škorić,Chigo Okonkwo

Optical Fiber Communication Conference (OFC) 2024（2024）

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摘要

We demonstrate classical and quantum signal co-propagation over a turbulent free-space channel with 3 Tbit/s throughput and record 2.7 Mbit/s secret-key rate. Our real-time GPU-based receiver assessed quantum signal integrity under different turbulence scenarios for the first time.

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关键词

Classical Signaling,Optical Channel,Secret Key,Turbulent Channel,Experimental Setup,Parameter Estimates,Probability Density Function,Graphics Processing Unit,Quantum Efficiency,Analog-to-digital Converter,Digital Signal Processing,Optical Amplifier,Shot Noise,Excessive Noise,Wavelength Division Multiplexing,Quadrature Amplitude Modulation,Quantum Key Distribution,Key Rate,Classical Channel

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