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Towards a standard procedure for the measurement of the multi-photon component in a CW telecom heralded single-photon source.

26.08.2019

Single-photon sources are set to be a fundamental tool for metrological applications as well as for quantum information related technologies. Because of their upcoming widespread dissemination, the need for their characterization and standardization is becoming of the utmost importance. Here, we illustrate a strategy to provide a quantitative estimate of the multi-photon component of a single-photon source, showing the results achieved in a pilot study for the measurement of the second-order autocorrelation function g(2)(0) of a low-noise CW heralded single photon source prototype (operating at telecom wavelength λ = 1550 nm) realized in INRiM. The results of this pilot study, involving INRiM, NPL and PTB, will help to build a robust and unambiguous procedure for the characterization of the emission of a single-photon source.

Single-photon sources are set to be a fundamental tool for metrological applications as well as for quantum information related technologies. Because of their upcoming widespread dissemination, the need for their characterization and standardization is becoming of the utmost importance. Here, we illustrate a strategy to provide a quantitative estimate of the multi-photon component of a single-photon source, showing the results achieved in a pilot study for the measurement of the second-order autocorrelation function g(2)(0) of a low-noise CW heralded single photon source prototype (operating at telecom wavelength λ = 1550 nm) realized in INRiM. The results of this pilot study, involving INRiM, NPL and PTB, will help to build a robust and unambiguous procedure for the characterization of the emission of a single-photon source.

Rebufello, E.; Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, ITALY ; Politecnico di Torino, Torino, ITALY
Piacentini, F.; Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, ITALY
López Ordonez, Marco Antonio; 4.5, Angewandte Radiometrie, PTB-Braunschweig
Kirkwood, R. A.; National Physical Laboratory (NPL), Teddington, UK
Ruo Berchera, I.; Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, ITALY
Gramegna, M.; Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, ITALY
Brida, G.; Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, ITALY
Kück, Stefan; 4, Optik, PTB-Braunschweig
Chunnilall, C. J.; National Physical Laboratory (NPL), Teddington, UK
Genovese, M.; Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, ITALY
Degiovanni, I. P.; Istituto Nazionale di Ricerca Metrologica (INRiM), Torino, ITALY

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