TY - JOUR
T1 - High-speed free-space optical continuous variable-quantum key distribution based on Kramers-Kronig scheme
AU - Qu, Zhen
AU - Djordjevic, Ivan B.
N1 - Funding Information:
Manuscript received September 26, 2018; accepted October 9, 2018. Date of publication October 11, 2018; date of current version October 29, 2018. This work was supported by the ONR MURI program (N00014-13-1-0627). Corresponding author: Dr. Zhen Qu (e-mail: zhenqu@email.arizona.edu).
Publisher Copyright:
© 2018 IEEE.
PY - 2018/12
Y1 - 2018/12
N2 - We propose and experimentally investigate a high-speed Kramers-Kronig (KK) scheme based continuous-variable quantum key distribution (CV-QKD) system over a free-space optical (FSO) channel. The atmospheric turbulence channel is emulated by three spatial light modulators on which three randomly generated azimuthal phase patterns yielding Andrews' spectrum are recorded. The proposed KK scheme enables a low-complexity implementation, insensitivity to laser phase noise, low detection noise, and accurate channel transmittance monitoring. In addition, eight state CV-QKD protocols and 10-channels wavelength-division multiplexing (WDM) scheme are experimentally verified to obtain a high secure key rate. In our experiment, the minimum transmittance of 0.6 is required to guarantee the secure transmission, and a total SKR of 2.1 Gb/s can be obtained at the mean transmittance in weak turbulence regime.
AB - We propose and experimentally investigate a high-speed Kramers-Kronig (KK) scheme based continuous-variable quantum key distribution (CV-QKD) system over a free-space optical (FSO) channel. The atmospheric turbulence channel is emulated by three spatial light modulators on which three randomly generated azimuthal phase patterns yielding Andrews' spectrum are recorded. The proposed KK scheme enables a low-complexity implementation, insensitivity to laser phase noise, low detection noise, and accurate channel transmittance monitoring. In addition, eight state CV-QKD protocols and 10-channels wavelength-division multiplexing (WDM) scheme are experimentally verified to obtain a high secure key rate. In our experiment, the minimum transmittance of 0.6 is required to guarantee the secure transmission, and a total SKR of 2.1 Gb/s can be obtained at the mean transmittance in weak turbulence regime.
KW - Continuous-variable quantum key distribution
KW - Kramers-Kronig scheme
KW - discrete modulation
KW - free-space optical communication
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U2 - 10.1109/JPHOT.2018.2875590
DO - 10.1109/JPHOT.2018.2875590
M3 - Article
AN - SCOPUS:85054614239
SN - 1943-0655
VL - 10
JO - IEEE Photonics Journal
JF - IEEE Photonics Journal
IS - 6
M1 - 8489900
ER -