Effects of filtering on the purity of heralded single photons from parametric sources

Daniel R. Blay; M. J. Steel; L. G. Helt

doi:10.1103/PhysRevA.96.053842

Effects of filtering on the purity of heralded single photons from parametric sources

Daniel R. Blay, M. J. Steel, L. G. Helt

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Optical quantum protocols are reliant on the production of highly pure single photons. However, most parametric heralded single-photon sources possess spectral correlations, limiting the purity of the produced photon. The most common method for restoring the purity is with narrowband spectral filtering, which comes at the cost of reducing the rate of heralding detection. Here, we characterize this trade-off analytically for a large class of parametric sources. It is possible to achieve up to 20% heralding success probabilities with 90% heralded photon purities.

Original language	English
Article number	053842
Pages (from-to)	1-8
Number of pages	8
Journal	Physical Review A
Volume	96
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevA.96.053842
Publication status	Published - 20 Nov 2017

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10.1103/PhysRevA.96.053842

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Effects of filtering on the purity of heralded single photons from parametric sources

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