Quantum frequency downconversion experiment

Abstract

We report the first quantum frequency downconversion experiment. Using the difference frequency generation process in a periodically poled lithium niobate waveguide, we successfully observed the phase-preserved frequency downconversion of a coherent pulse train with an average photon number per pulse of $<$1, from the 0.7-$\mu$m visible wavelength band to the 1.3-$\mu$m telecom band. We expect this technology to become an important tool for flexible photonic quantum networking, including the realization of quantum repeater systems over optical fiber using atom-photon entanglement sources for the visible wavelength bands.

4 pages, 6 figures

References in corpus (3)

• Experimental demonstration of a BDCZ quantum repeater node
• Erasing Distinguishability Using Quantum Frequency Up-Conversion
• Spatial modes in waveguided parametric down-conversion

Cited by in corpus (5)

• Visible-to-telecom quantum frequency conversion of light from a single quantum emitter
• From quantum pulse gate to quantum pulse shaper -- enigneered frequency conversion in nonlinear optical waveguides
• Approaches for a quantum memory at telecommunication wavelengths
• High-fidelity conversion of photonic quantum information to telecommunication wavelength with superconducting single-photon detectors
• A photon-pair source with controllable delay based on shaped inhomogeneous broadening of rare-earth doped solids