Fig. 3: Recorded coincidence histograms.
From: High-quality photonic entanglement out of a stand-alone silicon chip
a The histograms represent the recorded coincidences for both two-FSR shift and three-FSR shift resonances. The overall integration time is 10 s and the measurements are done with SSPD detectors (Fig. 1b). The two-FSR rate is of about 116 counts/s with an SNR of 67.5, whereas the three-FSR coincidence rate is of about 151 counts/s with a SNR of 100. The noise level within the peak is between 1.5 counts/s and 1.7 counts/s. b The histograms represent the coincidences at the output of the interferometric setup sketched in Fig. 1c for the two-FSR shift resonances. They show a maximum and a minimum of interference (region (1)). Here, the overall integration time is of 5 s. The error bars for all points come from Poissonian statistics associated with the pairs (e.g., \(\sqrt{N}\), N being the number of coincidences). It is noteworthy that similar histogram are obtained for the three-FSR shift case.
