QKD key generation control protocol
Nikita Rudavin, Ilya Gerasin, E E Mekhtiev, Alexey V. Duplinsky, Yury Kurochkin · Journal of Physics Conference Series · 2021
Abstract Polarization-encoding fiber QKD requires compensation of polarization distortion caused by birefringence in optical fiber. Solving this task inevitably requires losing some effectiveness in terms of the final key rate. In this work, a time-division multiplexing protocol for polarisation calibration is suggested. This protocol was implemented in a QRate commercial QKD fiber system, utilizing BB84-protocol. Parameters of the protocol were optimized to maximize the secret key rate.