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Single photon detection system for visible and infrared spectrum range

Alexander Divochiy, Marta Misiaszek, Yury Vakhtomin, Pavel Morozov, Konstantin Smirnov, Philipp Zolotov, and Piotr Kolenderski

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Abstract

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 4×104 in our detection setting. A photon detection efficiency as high as 64% at 1550 nm and 15% at 2300 nm was observed.

© 2018 Optical Society of America

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