Superconducting nanowire single-photon detectors (SNSPDs) have become the gold standard for single photon detection at telecom wavelengths, and their high efficiency, high dynamic range, low timing jitter, and low dark count rates make them ideal for quantum applications. Many use cases benefit from arrays of SNSPDs, whether it’s to enable number resolution, to access higher maximum count rates, to cover larger active areas, or to provide imaging or spectroscopy capabilities. SNSPD array design typically involves a tradeoff between number of channels, active area, and timing properties. In this talk, I will discuss several applications of SNSPD arrays and describe how the applications’ different requirements affect the array and system-level design choices.
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