PT Unknown AU Sobolewski, R Verevkin, A Gol’tsman, GN TI Superconducting optical single-photon detectors SE CLEO/QELS PY 2004 BP IThD1 DI 10.1364/IQEC.2004.IThD1 DE SSPD; QE; jitter; dark counts AB We review the development of superconducting single-photon detectors. The devices are characterized by experimental quantum efficiency of ~8% for infrared photons, counting rate ~2 GHz, 18 ps jitter, and <0.01 per second dark counts. ER