  We demonstrate the generation of quantum-correlated photon-pairs combined
with the spectral filtering of the pump field by more than 95dB using Bragg
reflectors and electrically tunable ring resonators. Moreover, we perform
demultiplexing and routing of signal and idler photons after transferring them
via a fiber to a second identical chip. Non-classical two-photon temporal
correlations with a coincidence-to-accidental ratio of 50 are measured without
further off-chip filtering. Our system, fabricated with high yield and
reproducibility in a CMOS process, paves the way toward truly large-scale
quantum photonic circuits by allowing sources and detectors of single photons
to be integrated on the same chip.
