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Q: Fachverband Quantenoptik und Photonik

Q 41: Poster – Quantum Technologies II & Laser Technology

Q 41.3: Poster

Wednesday, March 4, 2026, 17:00–19:00, Philo 2. OG

Sub-kHz, RF-traceable Frequency Comb with Dual-Domain Stabilization and Automated Locking — •Ali Seer, Jae-Ihn Kim, Florian Figge, Thomas Puppe, Christoph Stihler, and Matthias Scholz — TOPTICA Photonics SE, Gräfelfing, Germany

We present a dual-loop-stabilized DFG frequency comb providing simultaneous spectral purity and SI-traceable frequency accuracy. The scheme avoids the cost and complexity of high-finesse cavity-stabilized systems while delivering sub-kHz linewidths. A comb-comb comparison demonstrates an H-maser-like long-term stability limit. Fully automated locking and a unified GUI make the system a universal optical reference for quantum-optics experiments.

Keywords: frequency comb; quantum technology; spectral purity; frequency metrology; optical reference