Abstract
We report on the experimental realization and characterization of an asynchronous heralded single-photon source based on spontaneous parametric down-conversion. Photons at 1550 nm are heralded as being inside a single-mode fibre with more than 60% probability, and the multi-photon emission probability is reduced by a factor of up to more than 500 compared to Poissonian light sources. These figures of merit, together with the choice of telecom wavelength for the heralded photons, are compatible with practical applications needing very efficient and robust single-photon sources.
Highlights
We report on the experimental realization and characterization of an asynchronous heralded single-photon source based on spontaneous parametric down-conversion
Photons at 1550 nm are heralded as being inside a single-mode fibre with more than 60% probability, and the multi-photon emission probability is reduced by a factor of up to more than 500 compared to Poissonian light sources
The aim of this paper is to show that a spontaneous parametric down-conversion (SPDC) source made of a bulk non-linear crystal at room temperature and a simple basic optical setup can be used to herald single photons at telecom wavelength in a very efficient way
Summary
We report on the experimental realization and characterization of an asynchronous heralded single-photon source based on spontaneous parametric down-conversion. The aim of this paper is to show that a spontaneous parametric down-conversion (SPDC) source made of a bulk non-linear crystal at room temperature and a simple basic optical setup can be used to herald single photons at telecom wavelength in a very efficient way (see figure 1).
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