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- W3103978082 abstract "Any characterization of a single-photon source is not complete without specifying its second-order degree of coherence, i.e., its g(2) function. An accurate measurement of such coherence functions commonly requires high-precision single-photon detectors, in whose absence only time-averaged measurements are possible. It is not clear, however, how the resulting time-averaged quantities can be used to properly characterize the source. In this paper, we investigate this issue for a heralded source of single photons that relies on continuous-wave parametric down-conversion. By accounting for major shortcomings of the source and the detectors—i.e., the multiple-photon emissions of the source, the time resolution of photodetectors and our chosen width of coincidence window—our theory enables us to infer the true source properties from imperfect measurements. Our theoretical results are corroborated by an experimental demonstration using a PPKTP crystal pumped by a blue laser that results in a single-photon generation rate about 1.2 millions per second per milliwatt of pump power. This work takes an important step towards the standardization of such heralded single-photon sources." @default.
- W3103978082 created "2020-11-23" @default.
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- W3103978082 date "2009-05-15" @default.
- W3103978082 modified "2023-10-13" @default.
- W3103978082 title "Characterizing heralded single-photon sources with imperfect measurement devices" @default.
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- W3103978082 doi "https://doi.org/10.1088/0953-4075/42/11/114013" @default.
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