Figure 5
From: A study of polarization compensation for quantum networks
QBER minimization scheme effectively corresponds to having a source that produces entangled photon pairs at wavelengths corresponding to ITU channels shown in the table between each pair of users. The colours in the table represent different photon pairs that are distributed among the users, while channel numbers correspond to wavelengths symmetrically distributed around the central wavelength of 1550.12 nm (corresponding to channel 34)