Large-scale integrated quantum photonic technologies will require the on-chipintegration of identical photon sources with reconfigurable waveguide circuits.Relatively complex quantum circuits have already been demonstrated, but fewstudies acknowledge the pressing need to integrate photon sources and waveguidecircuits together on-chip. A key step towards such large-scale quantumtechnologies is the integration of just two individual photon sources within awaveguide circuit, and the demonstration of high-visibility quantuminterference between them. Here, we report a silicon-on-insulator devicecombining two four-wave mixing sources, in an interferometer with areconfigurable phase shifter. We configure the device to create and manipulatetwo-colour (non-degenerate) or same-colour (degenerate), path-entangled orpath-unentangled photon pairs. We observe up to 100.0+/-0.4% visibility quantuminterference on-chip, and up to 95+/-4% off-chip. Our device removes the needfor external photon sources, provides a path to increasing the complexity ofquantum photonic circuits, and is a first step towards fully-integrated quantumtechnologies.
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