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Heralded spontaneous parametric down-conversion (SPDC) has become the mainstay for single-photon-state preparation in present-day photonics experiments. Because they are heralded, in principle one knows when a single photon has been prepared. However, the heralding efficiencies in experimentally realistic SPDC sources are typically very low. To overcome this, multiplexing techniques have been proposed which employ a bank of SPDC sources in parallel and route successfully heralded photons to the output, thereby effectively boosting the heralding efficiency. However, running a large bank of independent SPDC sources is costly and requires complex switching. We analyze a multiplexing technique based on time-bin encoding that allows the heralding efficiency of just a single SPDC source to be increased. The scheme is simple and experimentally viable using present-day technology. We analyze the operation of the scheme in terms of experimentally realistic considerations, such as losses, detector inefficiency, and pump power.

Original languageEnglish
Article number053829
Pages (from-to)1-11
Number of pages11
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number5
Publication statusPublished - 11 Nov 2015

Bibliographical note

Rohde, Peter P., Helt, L. G., Steel, M. J., and Gilchrist, Alexei (2015). Multiplexed single-photon-state preparation using a fiber-loop architecture. Physical Review A, 92(5), 053829. Copyright (2015) by the American Physical Society. The original article can be found at http://dx.doi.org/10.1103/PhysRevA.92.053829.


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