Figure 4
(a) CAR and heralded second order cross-correlation as a function of the average pump power. The best CAR equals 2740. The integration time is 1 hour. The measured CAR at lowest power (10 mW) deviates from the trend as the accidentals peaks become saturated by the uncorrelated noise. The red and blue curves are a fit of the form \(\propto 1/{P}^{2}\) and P2 respectively. (b) Non-heralded second order coherence. (c) Simulated joint spectral amplitude. The dashed lines give the width of the bandpass filters used in the experiment.
