M. A. Moshkova,1 P. V. Morozov,2 A. V. Antipov,2,3 Yu. B. Vakhtomin,2,3 K. V. Smirnov1
1National Research Univ. Higher School of Economics (Russian Federation) 2LLC Scontel (Russian Federation) 3Moscow State Pedagogical Univ. (Russian Federation)
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We present the result of the creation and investigation of the multi-element superconducting single photon detectors, which can recognize the number of photons (up to six) in a short pulse of the radiation at telecommunication wavelengths range. The best receivers coupled with single-mode fiber have the system quantum efficiency of ⁓85%. The receivers have a 100 ps time resolution and a few nanoseconds dead time that allows them to operate at megahertz counting rate. Implementation of the multi-element architecture for creation of the superconducting single photon detectors with increased sensitive area allows to create the high efficiency receivers coupled with multi-mode fibers and with preserving of the all advantages of superconducting photon counters.
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M. A. Moshkova, P. V. Morozov, A. V. Antipov, Yu. B. Vakhtomin, K. V. Smirnov, "High-efficiency multi-element superconducting single-photon detector," Proc. SPIE 11771, Quantum Optics and Photon Counting 2021, 1177107 (18 April 2021); https://doi.org/10.1117/12.2589157