Fig. 2: In-lab characterisation of the QD-based single-photon source and the experimental setup.
From: High-rate intercity quantum key distribution with a semiconductor single-photon source
a Secret key per clock pulse as a function of excitation laser power in the asymptotic and finite-key regime. b Secret key bits (SKBs) per pulse as a function of the transmission loss. The maximum tolerable losses (MTLs) for the asymptotic case and finite-key block cases with different block sizes of \({n}_{R}^{Z}=1{0}^{3},1{0}^{5},1{0}^{8}\) are extracted to be 28.11, 25.51, 27.78 and 27.95 dB, respectively. The inset shows the measured and simulated QBER as a function of transmission loss with the dashed grey line indicating the QBER at zero
