Integration of a visible-telecom PPKTP photon pair source with Silicon Integrated Photonics

Abstract

We demonstrate integration of periodically-poled KTiOPO4 (PPKTP) waveguides generating visible-telecom wavelength photon pairs with Photonic Integrated Circuits, bridging visibly-accessed quantum technologies and telecom infrastructure. High pair rates, heralding and telecom-filterless operation are demonstrated.