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Efficient generation of single photons is one of the key challenges ofbuilding photonic quantum technology, such as quantum computers andlong-distance quantum networks. Photon source multiplexing -- where successfulpair generation is heralded by the detection of one of the photons, and itspartner is routed to a single mode output -- has long been known to offer aconcrete solution, with output probability tending toward unity as loss isreduced. Here, we present a temporally multiplexed integrated single photonsource based on a silicon waveguide and a low-loss fibre switch and looparchitecture, which achieves enhancement of the single photon outputprobability of $4.5 \pm 0.5$, while retaining $g^{(2)}(0) = 0.01$.

Enhancement of a silicon waveguide single photon source by temporal multiplexing