Abstract
We present the generation of quantum-correlated photon pairs and subsequent pump rejection across two silicon-on-insulator photonic integrated circuits. Incoherently cascaded lattice filters are used to provide over 100 dB pass-band to stop-band contrast with no additional external filtering. Photon pairs generated in a microring resonator are successfully separated from the input pump, confirmed by temporal correlations measurements.
Highlights
We present the generation of quantum-correlated photon pairs and subsequent pump rejection across two siliconon-insulator photonic integrated circuits
Integration of photon sources and filters on a single chip is a key step in realizing full-scale quantum photonic circuits
Filters based on coupled resonator optical waveguides (CROW) with extinction ratios in excess of 50 dB have been demonstrated in SiN [14] and silicon-oninsulator [15,16]
Summary
We present the generation of quantum-correlated photon pairs and subsequent pump rejection across two siliconon-insulator photonic integrated circuits. Quantum photonic experiments have been performed using bulky external optical filters [9,10,11,12,13], which typically exhibit high transmission losses. A CW beam was injected in the first chip, pumping a microring source generating correlated photon pairs, going through a 6-stage filter attenuating the pump while letting the photon pair through.
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