Dependence of dark count rates in superconducting single photon detectors on the filtering effect of standard single mode optical fibers

作者：Smirnov Konstantin; Vachtomin Yury; Divochiy Alexander; Antipov Andrey^*; Goltsman Gregory

来源：Applied Physics Express, 2015, 8(2): 022501.

DOI：10.7567/APEX.8.022501

We found that background radiation limits the dark count rates of superconducting single photon detectors coupled to standard single mode optical fibers to a minimum level when the source temperature of the photons is close to 300 K. We measured this level to be 10(3) cps, which was confirmed by a theoretical analysis of the background radiation influence. We also investigated the filtering-effect of cooled single mode optical fibers with different bending diameters and showed that for superconducting photon receivers with operating wavelengths below 2 pm the minimum dark count rate can be significantly decreased down to 0.1 cps.

• 出版日期2015-2