TY  - CONF
AU  - Verevkin, A. A.
AU  - Zhang, J.
AU  - Slysz, W.
AU  - Sobolewski, R.
AU  - Lipatov, A. P.
AU  - Okunev, O.
AU  - Chulkova, G.
AU  - Korneev, A.
AU  - Gol’tsman, G. N.
A2  - Free-Space Laser Communication and Laser Imaging II
ED  - Ricklin, J. C.
ED  - Voelz, D. G.
PY  - 2002
DA  - 2002//
TI  - Superconducting single-photon detectors for GHz-rate free-space quantum communications
T2  - Proc. SPIE
BT  - Proc. SPIE
SP  - 447
EP  - 454
VL  - 4821
PB  - SPIE
KW  - NbN SSPD
KW  - SNSPD
KW  - single-photon detector
KW  - thin-film superconductivity
KW  - quantum cryptography
KW  - ultrafast communications
AB  - We report our studies on the performance of new NbN ultrathin-film superconducting single-photon detectors (SSPDs). Our SSPDs exhibit experimentally measured quantum efficiencies from   5% at wavelength λ = 1550 nm up to  10% at λ = 405 nm, with exponential, activation-energy-type spectral sensitivity dependence in the 0.4-μm - 3-μm wavelength range. Using a variable optical delay setup, we have shown that our NbN SSPDs can resolve optical photons with a counting rate up to 10 GHz, presently limited by the read-out electronics. The measured device jitter was below 35 ps under optimum biasing conditions. The extremely high photon counting rate, together with relatively high (especially for λ > 1 μm) quantum efficiency, low jitter, and very low dark counts, make NbN SSPDs very promising for free-space communications and quantum cryptography.
UR  - https://doi.org/10.1117/12.453542
DO  - 10.1117/12.453542
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1523), last updated on Thu, 20 May 2021 22:22:15 -0500
ID  - Verevkin_etal2002
ER  -