Abstract
Although as a single-photon detector, the single-photon avalanche diode (SPAD) may be applied to multi-photon conditions. At a minimum, SPADs with a high dark count rate (DCR) demand a higher value of photon number per pulse to improve the signal-to-noise ratio. In this case, and without correction, severe pile-up distortion may induce a system error in the measurement of photon detection efficiency (PDE) and timing jitter. In this paper, we study the pile-up distortion in SPAD characterization by numerical simulation and experimentation, and introduce a pile-up correction method for the precise characterization of PDE and timing jitter in immature SPADs with an unintentionally high DCR. The results of this study are useful in the development of future SPADs.
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