Fig. 3: Measurement of the Coincidence over accidental ratio (CAR). | npj Nanophotonics

Fig. 3: Measurement of the Coincidence over accidental ratio (CAR).

From: A silicon integrated source of hyper-entangled photon pairs with rate exceeding 1 billion pairs per second

Fig. 3

We report the CAR obtained with a direct measurement of the coicindence rate, for four selected pairs of resonances. For most lower powers, the CAR exceeds the safe threshold of 20. However, at the highest powers, where the emission saturates due to nonlinear parasitic processes, the CAR drops to this threshold.

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