Excess noise control in Gaussian-modulated coherent state quantum key distribution system
Bing Qi, Leilei Huang, Yue-Meng Chi, Li Qian, Hoi‐Kwong Lo · Conference on Lasers and Electro-Optics · 2008
A novel polarization-frequency-multiplexing scheme is implemented to suppress noise in a fiber-based Gaussian-modulated coherent-state quantum key distribution system. The achievable secrete key rate is 0.30 bit/pulse with a 5 km-fiber and 0.05 bit/pulse with a 20 km-fiber.