3 papers
quant-ph2025
World's First Monolithic SiGe QKD Transmitter Chip
Florian Honz, Winfried Boxleitner, Mariana Ferreira-Ramos +4
We present a single-chip photonic QKD transmitter fabricated on a silicon platform. We achieve secure-key generation over 45.9km of field-deployed fiber and prove its operation alo…
quant-ph2025
FPA Beamforming for Alignment-Tolerant FSO QKD Links
Florian Honz, Winfried Boxleitner, Michael Hentschel +3
We demonstrate focal plane array beamforming for semi-blind deployments of free-space optical QKD links. We accomplish a secure-key rate of 1.2 kb/s at a QBER of 9.1% over a 63-m o…
quant-ph2024
Shortwave DPS-QKD Employing a SiN Micro-Ring Resonator as Compact Quantum State Analyser
Florian Honz, Paul Müllner, Michael Hentschel +6
We show simplified DPS-QKD using a SiN micro-ring resonator operated at 852 nm. A raw-key rate of up to 25.3 kb/s is reached at a QBER suitable for secure-key extraction. Short-rea…