Simplified Polarization-Encoding for BB84 QKD Sourced by Incoherent Light of a Silicon Emitter

ECOC 2023, Glasgow, United Kingdom, Oct. 2023, P38


Florian Honz, Nemanja Vokić, Philip Walther, Hannes Hübel, and Bernhard Schrenk


We investigate a polarization-encoded BB84-QKD transmitter that is simplified from an architectural and technological point-of-view, demonstrating a silicon emitter sourcing a low-complexity polarization modulator for secure-key generation at a raw-key rate of 2.8kb/s and QBER of 10.47%, underpinning the feasibility of an all-silicon QKD transmitter.

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