Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 1: Laser Technology and Applications (joint session Q/K)
Q 1.6: Vortrag
Montag, 10. März 2025, 12:15–12:30, HS V
How to generate XUV frequency combs with only 10 W? — •Muhammad Thariq1,2, Johannes Weitenberg1,3, Francesco Canella4,5, Gianluca Galzerano5, Theodor W. Hänsch1,2, Thomas Udem1,2, and Akira Ozawa1 — 1Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany — 2Fakultät für Physik, Ludwig-Maximilians-Universität München, 80799 Munich, Germany — 3Fraunhofer-Institut für Lasertechnik ILT, 52074 Aachen, Germany — 4Dipartimento di Fisica, Politecnico di Milano, 20133 Milan, Italy — 5Istituto di Fotonica e Nanotecnologie - Consiglio Nazionale delle Richerce, 20133 Milan, Italy
The extreme ultraviolet (XUV) frequency comb (FC) is a vital tool for extending optical frequency metrology into the unexplored wavelength range below 200 nm. However, generating XUV FCs via high harmonic generation (HHG) often demands very high peak intensities. This typically requires an enhancement resonator, where a circulating average power of 10 kW leads to heating and damage issues.
In this work, we propose using a low repetition rate FC to drive single-pass HHG. By reducing the repetition rate by three orders of magnitude with an AOM-based pulse picker while maintaining a high peak power and a frequency comb structure, the average power is decreased proportionally. We have generated high harmonics from a 40 kHz-repetition rate FC with a peak power of 140 MW and pulse width of 35 fs. The results demonstrate the feasibility of generating XUV FCs with average powers below 10 W, making them more accessible to researchers across disciplines.
Keywords: frequency combs; high harmonic generation; extreme ultraviolet; frequency metrology; low repetition rate