Table 1 Definition and quantum interference visibilities of the AWG channel pairs. “s” and “i” represent “signal” and “idler” photons, respectively. It should be noted that the central three channels (CH8, CH9 and CH10) of the AWG are in the range of the post filter (gray zone in Chip II in Fig. 3(a)). Thus, their visibilities are absent

From: Photonic-chip-based dense entanglement distribution