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Single photons are a vital resource for photonic quantum informationprocessing. However, even state-of-the-art single photon sources based onphoton-pair generation and heralding detection have only a low probability ofdelivering a single photon when one is requested. We analyse a scheme that usesa switched fibre delay loop to increase the delivery probability per time binof single photons from heralded sources. We show that, for realisticexperimental parameters, combining the output of up to 15 pulses can yield aperformance improvement of a factor of 10. We consider the future performanceof this scheme with likely component improvements.

Temporal Loop Multiplexing: A resource efficient scheme for multiplexed photon-pair sources