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Author Zolotov, P.; Divochiy, A.; Vakhtomin, Y.; Moshkova, M.; Morozov, P.; Seleznev, V.; Smirnov, K. url  doi
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  Title Photon-number-resolving SSPDs with system detection efficiency over 50% at telecom range Type Conference Article
  Year 2018 Publication Proc. AIP Conf. Abbreviated Journal  
  Volume 1936 Issue 1 Pages 020019  
  Keywords NbN PNR SSPD, SNSPD  
  Abstract We used technology of making high-efficiency superconducting single-photon detectors as a basis for improvement of photon-number-resolving devices. By adding optical cavity and using an improved NbN superconducting film, we enhanced previously reported system detection efficiency at telecom range for such detectors. Our results show that implementation of optical cavity helps to develop four-section device with quantum efficiency over 50% at 1.55 µm. Performed experimental studies of detecting multi-photon optical pulses showed irregularities over defining multi-photon through single-photon quantum efficiency.  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number doi:10.1063/1.5025457 Serial 1231  
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