PT Journal
AU Smirnov, K
   Vachtomin, Y
   Divochiy, A
   Antipov, A
   Goltsman, G
TI The limitation of noise equivalent power by background radiation for infrared superconducting single photon detectors coupled to standard single mode optical fibers
SO Rus. J. Radio Electron.
JI Rus. J. Radio Electron.
PY 2015
IS 5
DE NbN SSPD
AB We investigated the minimum level of the dark count rates and noise equivalent power of superconducting single photon detectors coupled to standard single mode optical fibers. We found that background radiation limits the minimum level of the dark count rates. We also proposed the effective method for reducing background radiation out of the required spectral range of the detector. Measured noise equivalent power of detector reaches 8.9×10-19 W×Hz1/2 at a wavelength of 1.55 μm and quantum efficiency 35%.
ER