I’m experiencing some confusion about the implementation of a Single Photon Detector (SPD) in OptiSystem. When I go into the Component View of the SPD after running a simulation and look at the Photon Counts vs. Time plot, I find that the detector gives the exact number of photons received during the time the detector was active. Does it function as a photon number resolving detector rather than a threshold detector? If so, is there any way to recover threshold detection functionality and integrate the number of clicks over a larger period of time?
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