TY - JOUR AU - Divochiy, A. AU - Misiaszek, M. AU - Vakhtomin, Y. AU - Morozov, P. AU - Smirnov, K. AU - Zolotov, P. AU - Kolenderski, P. PY - 2018 DA - 2018// TI - Single photon detection system for visible and infrared spectrum range T2 - Opt. Lett. JO - Opt. Lett. SP - 6085 EP - 6088 VL - 43 IS - 24 AB - We demonstrate niobium nitride based superconducting single-photon detectors sensitive in the spectral range 452-2300 nm. The system performance was tested in a real-life experiment with correlated photons generated by means of spontaneous parametric downconversion, where one photon was in the visible range and the other was in the infrared range. We measured a signal to noise ratio as high as 4x10(4) in our detection setting. A photon detection efficiency as high as 64% at 1550 nm and 15% at 2300 nm was observed. SN - 0146-9592 UR - https://www.osapublishing.org/ol/abstract.cfm?uri=ol-43-24-6085 UR - https://doi.org/10.1364/OL.43.006085 DO - 10.1364/OL.43.006085 LA - English N1 - https://arxiv.org/abs/1807.04273 ID - Divochiy_etal2018 ER -