https://doi.org/10.1051/epjconf/201510310010
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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
