Quantum entanglement distribution with 810 nm photons through active telecommunication fibers

Abstract

We demonstrate the distribution of polarization-entangled photons for the purpose of quantum key distribution (QKD) along active telecom fibers. Entangled photon pairs of 810 nm wavelength generated by a Sagnac interferometer source were coupled into standard telecom single mode fibers. The fibers were either dark or carrying a standardized 1550 nm ethernet signals (1000BASE-ZX) with a nominal speed of 1 GBps from regular media converter devices, without any requirements on the optical power or spectrum transmitted. Our system demonstrates a QKD network covering 6 km in distance with a central service provider for classical and quantum data.

References in corpus (9)

• Free-Space distribution of entanglement and single photons over 144 km
• A wavelength-tunable fiber-coupled source of narrowband entangled photons
• Quantum cryptography with finite resources: unconditional security bound for discrete-variable protocols with one-way post-processing
• Quantum key distribution with entangled photon sources
• Long-distance quantum key distribution in optical fiber
• Single-photon device requirements for operating linear optics quantum computing outside the post-selection basis
• QKD in Standard Optical Telecommunications Networks
• Quantum key distribution system in standard telecommunications fiber using a short wavelength single-photon source
• Quantum entanglement distribution with 810 nm photons through telecom fibers

Cited by in corpus (5)

• Coexistence of high-bit-rate quantum key distribution and data on optical fiber
• Long-distance distribution of genuine energy-time entanglement
• Optimal pair generation rate for Entanglement-based QKD
• Single-photon generation from a neodymium ion in optical fiber at room temperature
• Quantum entanglement distribution coexisting with high-rate, broadband classical optical communications over a real-world fiber connecting remote, synchronized nodes