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We demonstrate the generation of quantum-correlated photon-pairs combinedwith the spectral filtering of the pump field by more than 95dB using Braggreflectors and electrically tunable ring resonators. Moreover, we performdemultiplexing and routing of signal and idler photons after transferring themvia a fiber to a second identical chip. Non-classical two-photon temporalcorrelations with a coincidence-to-accidental ratio of 50 are measured withoutfurther off-chip filtering. Our system, fabricated with high yield andreproducibility in a CMOS process, paves the way toward truly large-scalequantum photonic circuits by allowing sources and detectors of single photonsto be integrated on the same chip.

An integrated source of spectrally filtered correlated photons for large scale quantum photonic systems