Efficient Statistical Separation of Primary Dark Counts and Afterpulses in Free-Running SPADs

Abstract

We describe a binning-free method to quantify primary dark counts and after pulses in free-running SPADs, requiring fewer samples than histogramming. This technique can enhance TCSPCs such as ToF LiDARs and fluorescence lifetime instruments.

Dead time duration and active reset influence on the afterpulse probability of InGaAs/InP single-photon avalanche diodes

“…For detectors for 1550 nm wavelength photons, based on InGaAs/InP SPAD, the total relaxation time is about 10 − 50 µs at a temperature of about −100 − −50 • C. For Sibased photon detectors for visible radiation, the full relaxation time is about 200 ns [13]. As methods of struggle of this effect, we can use SPD circuits with dead time -the time during which a new triggering cannot be recorded on the detector after the previous triggering.…”