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Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Nanooptik

Humboldt-Universität zu Berlin | Mathematisch-Naturwissen­schaft­liche Fakultät | Institut für Physik | Nanooptik | Publications | Heralded wave packet manipulation and storage of a frequency-converted pair photon at telecom wavelength

Tim Kroh, Andreas Ahlrichs, Benjamin Sprenger, and Oliver Benson (2017)

Heralded wave packet manipulation and storage of a frequency-converted pair photon at telecom wavelength

Quantum Sci. Technol., 2(3):034007.

Future quantum networks require a hybrid platform of dissimilar quantum systems. Within the platform, joint quantum states have to be mediated either by single photons, photon pairs or entangled photon pairs. The photon wavelength has to lie within the telecommunication band to enable long-distance fibre transmission. In addition, the temporal shape of the photons needs to be tailored to efficiently match the involved quantum systems. Altogether, this requires the efficient coherent wavelength-conversion of arbitrarily shaped single-photon wave packets. Here, we demonstrate the heralded temporal filtering of single photons as well as the synchronisation of state manipulation and detection as key elements in a typical experiment, besides of delaying a photon in a long fibre. All three are realised by utilising commercial telecommunication fibre-optical components which will permit the transition of quantum networks from the lab to real-world applications. The combination of these renders a temporally filtering single-photon storage in a fast switchable fibre loop possible.

quantum frequency conversion, temporal filtering, quantum communication, cavity-enhanced spontaneous parametric down-conversion, photon storage, nonlinear quantum optics