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10 March 2020 Silicon photonics-based experimental daylight free-space quantum key distribution at telecom wavelength (Conference Presentation)
Marco Avesani, Luca Calderaro, Matteo Schiavon, Andrea Stanco, Costantino Agnesi, Alberto Santamato, Mujtaba Zahidy, Alessia Scriminich, Giulio Foletto, Marco Chiesa, Massimo Artiglia, Alberto Montanaro, Marco Romagnoli, Vito Sorianello, Francesco Vedovato, Giuseppe Vallone, Paolo Villoresi
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Proceedings Volume 11295, Advanced Optical Techniques for Quantum Information, Sensing, and Metrology; 1129508 (2020) https://doi.org/10.1117/12.2543867
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
The future global-scale quantum communication network will require free-space and satellite links able to work in daylight conditions and compatible with the telecom fiber infrastructure. Here we present a full prototype for daylight quantum key distribution at 1550 nm exploiting an integrated silicon-photonics chip as state encoder. We tested our prototype in the urban area of Padua (Italy) over a 145m-long free-space link, obtaining a quantum bit error rate around 0.5% and an averaged secret key rate of 30 kbps. The developed chip represents a cost-effective solution for portable free-space transmitters and a promising resource for future satellite missions.
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Marco Avesani, Luca Calderaro, Matteo Schiavon, Andrea Stanco, Costantino Agnesi, Alberto Santamato, Mujtaba Zahidy, Alessia Scriminich, Giulio Foletto, Marco Chiesa, Massimo Artiglia, Alberto Montanaro, Marco Romagnoli, Vito Sorianello, Francesco Vedovato, Giuseppe Vallone, and Paolo Villoresi "Silicon photonics-based experimental daylight free-space quantum key distribution at telecom wavelength (Conference Presentation)", Proc. SPIE 11295, Advanced Optical Techniques for Quantum Information, Sensing, and Metrology, 1129508 (10 March 2020); https://doi.org/10.1117/12.2543867
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KEYWORDS
Quantum key distribution
Silicon photonics
Silicon
Computer programming
Quantum communications
Transmitters
Polarization
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