Integrated InP-based transmitter for Continuous-Variable Quantum Key Distribution

• URL: http://arxiv.org/abs/2412.03208v1
• Date: Wed, 04 Dec 2024 10:46:41 GMT
• Title: Integrated InP-based transmitter for Continuous-Variable Quantum Key Distribution
• Authors: Jennifer Aldama, Samael Sarmiento, Luis Trigo Vidarte, Sebastian Etcheverry, Ignacio López Grande, Lorenzo Castelvero, Alberto Hinojosa, Tobias Beckerwerth, Yoann Piétri, Amine Rhouni, Eleni Diamanti, Valerio Pruneri,
• Abstract summary: In this work, we design, fabricate and characterize an InP-based PIC transmitter for continuous-variable (CV) QKD applications. Results show the potential of InP technologies to integrate CV-QKD systems onto a monolithic platform.
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• Abstract: Developing quantum key distribution (QKD) systems using monolithic photonic integrated circuits (PICs) can accelerate their adoption by a wide range of markets, thanks to the potential reduction in size, complexity of the overall system, power consumption, and production cost. In this work, we design, fabricate and characterize an InP-based PIC transmitter for continuous-variable (CV) QKD applications. In a proof-of-principle experiment implementing a pulsed Gaussian-modulated coherent state (GMCS) CV-QKD protocol over an optical fiber channel of 11 km, the system showed a performance compatible with a secret key rate of 78 kbps in the asymptotic regime. These results show the potential of InP technologies to integrate CV-QKD systems onto a monolithic platform.

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