Open AccessContinuous-variable quantum key distribution with 1 Mbps secure key rate
Author(s) -
Duan Huang,
Dakai Lin,
Chao Wang,
Weiqi Liu,
Shuanghong Fang,
Jinye Peng,
Peng Huang,
Guihua Zeng
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.017511
Subject(s) - quantum key distribution , multiplexer , wavelength division multiplexing , computer science , key (lock) , multiplexing , detector , quantum channel , noise (video) , optics , quantum cryptography , local oscillator , electronic engineering , telecommunications , photon , physics , quantum entanglement , phase noise , wavelength , quantum , engineering , quantum information , computer security , quantum mechanics , artificial intelligence , image (mathematics)
We report the first continuous-variable quantum key distribution (CVQKD) experiment to enable the creation of 1 Mbps secure key rate over 25 km standard telecom fiber in a coarse wavelength division multiplexers (CWDM) environment. The result is achieved with two major technological advances: the use of a 1 GHz shot-noise-limited homodyne detector and the implementation of a 50 MHz clock system. The excess noise due to noise photons from local oscillator and classical data channels in CWDM is controlled effectively. We note that the experimental verification of high-bit-rate CVQKD in the multiplexing environment is a significant step closer toward large-scale deployment in fiber networks.