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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 4: Poster (joint session K/Q)
K 4.16: Poster
Dienstag, 3. März 2026, 17:00–19:00, Philo 1. OG
Dispersive-Wave Generation in a Kagome-Type Hollow-Core Fibre by Few-Cycle-Pulses — •David Zuber1,2, Fridolin Jakob Geesmann1, Ihar Babushkin1,2,3, and Uwe Morgner1,2 — 1Leibniz University Hannover, Institute of Quantum Optics, Hannover, Germany — 2Cluster of Excellence PhoenixD, Hannover, Germany — 3Max Born Institute, Berlin, Germany
Tunable ultrashort pulses in the ultraviolet (UV) spectral range have attracted significant attention in a variety of applications, including pump-probe spectroscopy, lithography, and the control of chemical reactions. Conventional laser systems are often limited by the availability of suitable gain media, while their nonlinear counterparts such as optical parametric amplifiers or oscillators face constraints imposed by crystal absorption, phase-matching conditions, and the availability of sufficiently energetic pump photons. The presented UV source is based on dispersive-wave generation in a gas-filled Kagome-type hollow-core fibre. The fibre is pumped with a few-cycle OPCPA system, thereby generating a tunable UV radiation peak accompanied by a broadband background spanning more than 1 PHz. The experimental findings are supported by numerical simulations, which demonstrate the potential for producing few-cycle pulses directly in the UV. In addition, the paper discusses prospects for extending this concept toward the extreme-ultraviolet regime.
Keywords: Dispersive-Wave Generation; Few-Cycle Pulses; Ultraviolet; Kagome Hollow-Core Fibre