Picosecond Synchronization of Photon Pairs through a Fiber Link between Fermilab and Argonne National Laboratories

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 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 $\pm$ 2 to 5.3 $\pm$ 0.4 due to Raman scattering of the O-band clock pulses. Despite this reduction, the CAR is nevertheless suitable for quantum networks.

References in corpus (4)

• Ultra fast quantum key distribution over a 97 km installed telecom fiber with wavelength-division multiplexing clock synchronization
• Design and Implementation of the Illinois Express Quantum Metropolitan Area Network
• Advanced Architectures for High-Performance Quantum Networking
• Picosecond synchronization system for quantum networks

Cited by in corpus (6)

• Development of a Boston-area 50-km fiber quantum network testbed
• Quantum teleportation coexisting with classical communications in optical fiber
• Designing Noise-Robust Quantum Networks Coexisting in the Classical Fiber Infrastructure
• Metropolitan-scale Entanglement Distribution with Co-existing Quantum and Classical Signals in a single fiber
• Hong-Ou-Mandel Interference with a Coexisting Clock using Transceivers for Synchronization over Deployed Fiber
• Quantum entanglement distribution coexisting with high-rate, broadband classical optical communications over a real-world fiber connecting remote, synchronized nodes