Experimental demonstration of high-rate Gaussian-modulated continuous-variable quantum key distribution with a local-local oscillator
Abstract
In this paper, a high-rate Gaussian-modulated coherent-state (GMCS) continuous-variable quantum key distribution (CV-QKD) scheme with a local local oscillator is experimentally demonstrated. The transmission of quantum signal and pilot tone in optical fiber adopts frequency and polarization multiplexing technology. By optimizing frequency bandwidth, modulation variance and intensity of the pilot tone, the CVQKD system is demonstrated at different metropolitan distance, and the secure key rate of 13.53Mbps, 8.24Mbps, 5.39Mbps 3.66Mbps and 2.55Mbps over transmission distance of 5km, 10km, 15km, 20km and 25km are obtained, respectively.
- Publication:
-
Quantum and Nonlinear Optics VIII
- Pub Date:
- October 2021
- DOI:
- 10.1117/12.2601422
- Bibcode:
- 2021SPIE11905E..15P