학술논문
Picosecond Synchronization System for the Distribution of Photon Pairs Through a Fiber Link Between Fermilab and Argonne National Laboratories
Document Type
Periodical
Author
Source
IEEE Journal of Quantum Electronics IEEE J. Quantum Electron. Quantum Electronics, IEEE Journal of. 59(4):1-7 Aug, 2023
Subject
Language
ISSN
0018-9197
1558-1713
1558-1713
Abstract
We demonstrate a three-node quantum network for C-band photon pairs using 2 pairs of 59 km of deployed fiber between Fermi and Argonne National Laboratories. The C-band pairs are directed to nodes using a standard telecommunication switch and the detection system is synchronized to picosecond-scale timing resolution using a coexisting O- or L-band optical clock distribution system. We measure a reduction of coincidence-to-accidental ratio (CAR) of the C-band pairs from 51 ± 2 to 5.3 ± 0.4 due to Raman scattering of the O-band clock pulses. Despite this reduction, the CAR is nevertheless suitable for quantum networks.