Measurement of photon flux and photon purity (g2) of single-photon sources. Calibration of photon flux of single-photon sources and attenuated lasers with single-photon detectors. Measurements of g(2)-function in CW and pulsed mode using Hanbury Brown Twiss interferometer. Applications for quantum light sources are: Quantum Communication and Quantum Key Distribution (QKD). For further details, please contact us.