Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 36: Matter Wave Interferometry and Metrology I

Q 36.4: Talk

Wednesday, March 4, 2026, 15:15–15:30, P 11

Ultra-low phase noise from X- to the THz-band enabled by Difference Frequency Comb. — •Sebastian Müller, Mikhail Volkov, and Thomas Puppe — Lochhamer Schlag 19, 82166 Graefelfing, Germany

Frequency-comb-based generation of RF and THz signals with record-low phase noise becomes an enabling technology for a variety of applciations from spectroscopy to communication. Here, using an offset-free difference frequency comb, we report ultra-low noise 9.6 GHz microwaves reaching -165 dBc/Hz using optical frequency division (OFD). We also show tunable sub-THz frequency synthesis (0.1-0.5 THz) for characterization of RF components.

Keywords: Optical Frequency Division; Microwaves; THz; Frequency Combs; Ultra-low-noise