Abstract
Abstract We measure the ability of the Leonardo Selex Advanced Photodiode HgCdTe Infrared Array (SAPHIRA) avalanche photodiode array to perform photon counting. The current SAPHIRA arrays achieve >90% single-photon efficiency (independent of quantum efficiency expected to be also >90%) and a time resolution of 125 μs with a dark current of 21e − s−1 pix−1. Our characterization of several iterations of the SAPHIRA detector over the past 3 years of its development have also revealed a broader pulse height distribution than was originally expected.
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