The Source of Time-Correlated Photons at 1.064 μm and its Applications
1 Faculty of Physics, International Laser Center of M.V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
2 “Laboratory of Optoelectronic Devices” Ltd., P.N. Lebedev Physical Institute of the Russian Academy of Sciences 53 Leninskii Prospekt, Moscow, 119991, Russia
3 Joint Institute for High Temperatures of Russian Academy of Sciences (JIHT), 13 Bd.2 Izhorskaya st., Moscow, 125412, Russia
Published online: 25 September 2015
The source of time-correlated photon-pairs at 1064 nm is described. The source consists of the spontaneous parametric down-conversion (SPDC) generator, pumped by cw laser operating at 532 nm, and the measuring and control appliances. One of the main parts of the electronic systems is the “time-to-digital converter” which is designed and built by our group. The system allows to create and detect correlation of photon pairs with resolution better than 1 ns. We adduce the results of a quantum key distribution through open air. The key length was about 5000 bits and the accuracy ~0.1%.
Key words: quantum optics / spontaneous parametric down-conversion
© Owned by the authors, published by EDP Sciences, 2015
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