Narrowband polarization-entangled photon pairs distributed over a WDM link for qubit networks

Abstract

We present a bright, narrowband, portable, quasi-phase-matched two-crystal source generating polarization-entangled photon pairs at 809 nm and 1555 nm at a maximum rate of 1.2 10^6 s-1 THz-1 mW-1 after coupling to single-mode fiber. The quantum channel at 1555 nm and the synchronization signal gating the single photon detector are multiplexed in the same optical fiber of length 27 km by means of wavelength division multiplexers (WDM) having 100 GHz (0.8 nm) spacing between channels. This implementation makes quantum communication applications compatible with current high-speed optical networks.

8 pages, 4 figures

Cited by in corpus (11)

• High coherence photon pair source for quantum communication
• Long-distance distribution of genuine energy-time entanglement
• Broadening the bandwidth of entangled photons: a step towards the generation of extremely short biphotons
• Polarization-entangled photon-pair generation in commercial-grade polarization-maintaining fiber
• Designing Noise-Robust Quantum Networks Coexisting in the Classical Fiber Infrastructure
• Parametric down-conversion from a wave-equations approach: geometry and absolute brightness
• Experimental wavelength division multiplexed photon pair distribution
• Two Polarization Entangled Sources from the Same Semiconductor Chip
• Actively switchable non-degenerate polarization entangled photon pair distribution in a dense wave-division multiplexing
• A single-crystal source of path-polarization entangled photons at non-degenerate wavelengths
• Quantum entanglement distribution coexisting with high-rate, broadband classical optical communications over a real-world fiber connecting remote, synchronized nodes