期刊
OPTICS EXPRESS
卷 28, 期 10, 页码 14547-14559出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.391491
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资金
- Horizon 2020 Framework Programme [820466]
- Ministerio de Economia y Competitividad [SEV-2015-0522]
- Fundacion Privada Cellex
- Fundacio Mir-Puig
- Generalitat de Catalunya (CERCA program)
- Vetenskapsradet (International postdoc grant)
- Deutscher Akademischer Austauschdienst
- European Regional Development Fund (ERDF Operational Program of Catalonia 2014-2020)
- H2020 Marie Sklodowska-Curie Actions [713729]
- Marie Curie Actions (MSCA) [713729] Funding Source: Marie Curie Actions (MSCA)
We report a plug-and-play continuous variable quantum key distribution system (CV-QKD) with Gaussian modulated quadratures and a true local oscillator. The proposed configuration avoids the need for frequency locking two narrow line-width lasers. To minimize Rayleigh back-scattering, we utilize two independent fiber strands for the distribution of the laser and the transmission of the quantum signals. We further demonstrate the quantum-classical co-existing capability of our system by injecting high-power classical light in both fibers. A secret key rate up to 0.88 Mb/s is obtained by using two fiber links of 13 km and up to 0.3 Mb/s when adding 4 mW of classical light in the optical fiber used for transmitting the quantum signal. The reported performance indicates that the proposed QKD scheme has the potential to become an effective low-cost solution for metropolitan optical networks. (c) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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