Abstract

Here we present a reconstruction of the positive operator-value measurement of a photon-number-resolving detector comprised of three 50∶50 beam-splitters in a tree configuration, terminated with four single-photon avalanche detectors. The four detectors’ outputs are processed by an electronic board that discriminates detected photon number states from 0 to 4 and implements a “smart counting” routine to compensate for dead time issues at high count rates.

© 2015 Optical Society of America

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