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Proceedings Paper

Silicon photonics-based experimental daylight free-space quantum key distribution at telecom wavelength (Conference Presentation)
Author(s): 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

Paper 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.

Paper Details

Date Published: 10 March 2020
PDF
Proc. SPIE 11295, Advanced Optical Techniques for Quantum Information, Sensing, and Metrology, 1129508 (10 March 2020); doi: 10.1117/12.2543867
Show Author Affiliations
Marco Avesani, Univ. degli Studi di Padova (Italy)
Luca Calderaro, Univ. degli Studi di Padova (Italy)
Matteo Schiavon, Univ. degli Studi di Padova (Italy)
Andrea Stanco, Univ. degli Studi di Padova (Italy)
Costantino Agnesi, Univ. degli Studi di Padova (Italy)
Alberto Santamato, Univ. degli Studi di Padova (Italy)
Mujtaba Zahidy, Univ. degli Studi di Padova (Italy)
Alessia Scriminich, Univ. degli Studi di Padova (Italy)
Giulio Foletto, Univ. degli Studi di Padova (Italy)
Marco Chiesa, Sant’Anna Scuola Univ. Superiore Pisa (Italy)
Massimo Artiglia, CNIT - Photonic Networks & Technologies National Lab. (Italy)
Alberto Montanaro, CNIT - Photonic Networks & Technologies National Lab (Italy)
Marco Romagnoli, CNIT - Photonic Networks & Technologies National Lab. (Italy)
Vito Sorianello, CNIT - Photonic Networks & Technologies National Lab. (Italy)
Francesco Vedovato, Univ. degli Studi di Padova (Italy)
Giuseppe Vallone, Univ. degli Studi di Padova (Italy)
Paolo Villoresi, Univ. degli Studi di Padova (Italy)


Published in SPIE Proceedings Vol. 11295:
Advanced Optical Techniques for Quantum Information, Sensing, and Metrology
Philip R. Hemmer; Alan L. Migdall; Zameer Ul Hasan, Editor(s)

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