Free space daylight ground-ground QKD in the near-IR
Jan Tepper, Nils Hellerhoff, Alberto Comin
TL;DR
This paper demonstrates a daylight free-space quantum key distribution over several kilometers at 850nm, achieving low error rates and practical key rates using polarization encoding and classical channels.
Contribution
It presents the first daylight km-range free space QKD demonstration at 850nm with high key rate and low error rate, utilizing polarization encoding and auxiliary beams.
Findings
QBER of 1.9% achieved
Raw key rate of 14 kbit/s obtained
Successful operation in daylight conditions
Abstract
We report a daylight km-range free space QKD demonstration at 850nm obtaining a QBER of 1.9\% and a raw key-rate of 14 kbit/s. We used the BB84 protocol with polarisation encoding and two supporting optical beams for classical communication and clock synchronisation.
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Taxonomy
TopicsOptical Wireless Communication Technologies · Optical Systems and Laser Technology · Infrared Target Detection Methodologies