We present a multiplexed single photon source that re-synchronises heralded single photons generated by four-wave mixing in photonic crystal fibre using a fibre delay loop controlled by a single switch. By combining the probabilities of generating heralded single photons on four consecutive pump pulses we obtain an enhancement of the per-bin single-photon delivery probability. Our source demonstrates a way in which single-photon source multiplexing may be carried out with minimised resource overhead while retaining the benefits of a robust and alignment-free platform.
Hoggarth, R. A., Francis-Jones, R. J. A., & Mosley, P. J. (2017). Resource-efficient fibre-integrated temporal multiplexing of heralded single photons. Journal of Optics, 19(12), [125503 ]. https://doi.org/10.1088/2040-8986/aa979e