Integrated InP-based transmitter for continuous-variable quantum key distribution
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.
Authors
- Lorenzo Castelvero (ORCID: https://orcid.org/0000-0002-3145-5214)
- Tobias Beckerwerth (ORCID: https://orcid.org/0000-0003-0989-0460)
- Valerio Pruneri (ORCID: https://orcid.org/0000-0002-6425-9332)
- Luis Trigo Vidarte (ORCID: https://orcid.org/0000-0003-3686-3820)
- Eleni Diamanti (ORCID: https://orcid.org/0000-0003-1795-5711)
- S. Etcheverry (ORCID: https://orcid.org/0000-0002-7010-0598)
- Yoann Piétri (ORCID: https://orcid.org/0009-0005-0734-3529)
- J. Aldama (ORCID: https://orcid.org/0000-0001-6585-9420)
- Ignacio H. López Grande (ORCID: https://orcid.org/0000-0002-4330-881X)
- Amine Rhouni (ORCID: https://orcid.org/0000-0002-2865-3674)
- Samael Sarmiento-Hernández
Institutions
- Institució Catalana de Recerca i Estudis Avançats (ES)
- Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute (DE)
- Sorbonne Université (FR)
- Shanghai Institute for Science of Science (CN)
- Universidad del Alba (CL)
- Barcelona Institute of Science and Technology (ES)
- Laboratoire Médiations (FR)
- Institute of Science and Technology
Publication Details
- Journal
- Optics Express
- Published
- 2025-02-04
- DOI
- https://doi.org/10.1364/oe.550386
- Citations
- 4
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 9.92