Time-multiplexed heralded single-photon source

Fumihiro Kaneda, Bradley G. Christensen, Jia Jun Wong, Hee Su Park, Kevin T. McCusker, Paul G. Kwiat

Research output: Contribution to journalArticle


Photons have proven to be excellent carriers of quantum information and play essential roles in numerous quantum information processing (QIP) applications. In particular, heralded single-photon sources via spontaneous parametricdown conversion (SPDC) have been a key technology for demonstrating small-scale QIP, yet their low generation efficiency is a critical limitation to furthering the scale-up of optical QIP technology. In order to efficiently overcome the probabilistic nature of SPDC, here we demonstrate time multiplexing for up to 30 time slots of a periodically pumped heralded single-photon source using a switchable low-loss optical storage cavity. We observe a maximum single-photon probability of 38.6 ± 0.4% in periodic output time windows, corresponding to ∼6 times enhancement over a nonmultiplexed source but with no increase in the contribution of unwanted multiphoton events. Combining this time-multiplexing technique with a heralded source producing pure single-photon states should enable larger-scale optical QIP systems than previously realized.

Original languageEnglish (US)
Pages (from-to)1010-1013
Number of pages4
Issue number12
StatePublished - Nov 30 2015

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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    Kaneda, F., Christensen, B. G., Wong, J. J., Park, H. S., McCusker, K. T., & Kwiat, P. G. (2015). Time-multiplexed heralded single-photon source. Optica, 2(12), 1010-1013. https://doi.org/10.1364/OPTICA.2.001010