%0 Journal Article
%T Fiber-coupled single-photon detectors based on NbN superconducting nanostructures for practical quantum cryptography and photon-correlation studies
%A Słysz, W.
%A Węgrzecki, M.
%A Bar, J.
%A Grabiec, P.
%A Górska, M.
%A Zwiller, V.
%A Latta, C.
%A Bohi, P.
%A Milostnaya, I.
%A Minaeva, O.
%A Antipov, A.
%A Okunev, O.
%A Korneev, A.
%A Smirnov, K.
%A Voronov, B.
%A Kaurova, N.
%A Gol’tsman, G.
%A Pearlman, A.
%A Cross, A.
%A Komissarov, I.
%A Verevkin, A.
%A Sobolewski, R.
%J Appl. Phys. Lett.
%D 2006
%V 88
%N 26
%@ 0003-6951
%F Slysz_etal2006
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1449), last updated on Sun, 16 May 2021 20:57:28 -0500
%X We have fabricated and tested a two-channel single-photon detector system based on two fiber-coupled superconducting single-photon detectors (SSPDs). Our best device reached the system quantum efficiency of 0.3% in the 1540-nm telecommunication wavelength with a fiber-to-detector coupling factor of about 30%. The photoresponse consisted of 2.5-ns-wide voltage pulses with a rise time of 250ps and timing jitter below 40ps. The overall system response time, measured as a second-order, photon cross-correlation function, was below 400ps. Our SSPDs operate at 4.2K inside a liquid-helium Dewar, but their optical fiber inputs and electrical outputs are at room temperature. Our two-channel detector system should find applications in practical quantum cryptography and in antibunching-type quantum correlation measurements.The authors would like to thank Dr. Marc Currie for his assistance in early time-resolved photoresponse measurements and Professor Atac Imamoglu for his support. This work was supported by the Polish Ministry of Science under Project No. 3 T11B 052 26 (Warsaw), RFBR 03-02-17697 and INTAS 03-51-4145 grants (Moscow), CRDF Grant No. RE2-2531-MO-03 (Moscow), RE2-2529-MO-03 (Moscow and Rochester), and US AFOSR FA9550-04-1-0123 (Rochester). Additional funding was provided by the grants from the MIT Lincoln Laboratory and BBN Technologies Corp.
%K SSPD
%K SNSPD
%R 10.1063/1.2218105
%U http://aip.scitation.org/doi/10.1063/1.2218105
%U https://doi.org/10.1063/1.2218105
%P 261113 (1 to 3)