Integrated Photon-Pair Generation and ~112 dB Pump Rejection Filters for Silicon Quantum Photonics

We demonstrate on-chip quantum-correlated photons and rejection of pump photons by ∼112 dB using filters on two silicon-on-insulator photonic integrated circuits. The photon pairs had coincidence-to-accidental ratio (CAR) of 155 at 0.2 mW pump power.