Mainz 2026 – scientific programme
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SYLA: Symposium New Trends in Laser Systems and their Applications for Photonic Quantum Systems and Emerging Technologies
SYLA 2: Laser Sources for Emerging Technologies – Enabling the Future
SYLA 2.1: Invited Talk
Wednesday, March 4, 2026, 14:30–15:00, HS 20
Low-Noise Quantum Frequency Conversion for NV-Based Quantum Network Nodes — •Bernd Jungbluth1, Fabian Geus1, Ludwig Hollstein1, Hans Huber1, and Florian Elsen1,2 — 1Fraunhofer-Institute for Laser Technology ILT, Aachen, Germany — 2RWTH Aachen University, Aachen, Germany
We present two low-noise quantum frequency converters enabling telecom-band photon emission from NV centers. The NORA-QFC, deployed in the Q.Link demonstrator (Delft-The Hague), achieves >48% efficiency with less than 2 noise counts per second and per picometer filter bandwidth. A second, compact two-stage converter developed in the BMBF-funded HIFI project was implemented in Aachen for integration into a local NV-center node for scalable photonic interface testing.
Keywords: Quantum Frequency Conversion; Remote Entanglement Distribution; Quantum Repeater; Quantum Internet