Abstract

Transition-edge sensors (TES) are photon-number resolving calorimetric spectrometers with near unit efficiency [1]. Their recovery time, which is on the order of microseconds, limits the number resolving ability and timing accuracy in high photon-flux conditions because of the finite probability of overlap between detection events. When detecting near-infrared radiation, the low signal-to-noise precludes the use of established techniques based on signal differentiation for high energy radiation [2]. We approach the problem by separating it into two distinct phases: an initial event identification, followed by a more accurate timing discrimination [3].

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