Frequency down-conversion for efficient, low-noise quantum frequency converters
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-03-02 |
| Authors | Jan Fabian Geus, Florian Elsen, Sebastian Nyga, Bernd Jungbluth, Hans-Dieter Hoffmann |
| Institutions | RWTH Aachen University, Fraunhofer Institute for Laser Technology |
Abstract
Section titled āAbstractāWe present a novel device for the efficient, low-noise down-conversion of low-power light from the red visible spectrum. It can be applied to interface electronic spin-qubits in nitrogen-vacancy centers in diamond to the telecommunication wavelengths and thus offers the possibility to implement large-scale quantum networks in existing fiber infrastructure. In comparison to state-of-the-art frequency converters for this application, the device presented here generates an overall noise rate, which is one order of magnitude better than current record values. Simultaneously, an internal conversion efficiency of 50 % was measured. Furthermore, the converter serves as a feasibility demonstration of a general concept for the down-conversion of light from the sub-micron spectral range to telecommunication wavelengths.