Paper 14093-48
Paper 14093-48
Tailoring glass properties and microstructure with sub-100 femtosecond pulses
15 April 2026 • 12:00 - 12:15 CEST | Curie A (Niveau/Level 1)
Abstract
Sub-100 fs pulses are desirable for various applications in glass micromachining and there exist several devices for retrospective pulse compression. The physical process behind the compression mechanism influences the pulse characteristics, in particular its temporal shape and the broadened spectrum. We investigate the impact of two compression methods on fused silica micromachining: Optical parametric amplification generates a tuneable almost Gaussian-shaped spectrum with low conversion efficiency. Self-phase modulation within a multi-pass cell broadens the spectrum with oscillations around the initial wavelength with almost no losses for the pulse compression.
Presenter
Lisa Ackermann
EPFL (Switzerland)
Lisa Ackermann is a postdoctoral researcher at the Galatea lab at EPFL, Switzerland. She joined the lab in January 2024 and focuses on ultrafast laser material interaction. From 2018-2023 she did her PhD at the Institute of Photonic Technologies at the University of Erlangen-Nürnberg, Germany, where she focused on phase-only beam shaping for laser materials processing using ultrafast lasers. During studying physics at the University of Erlangen-Nürnberg, Germany, she did her Master’s thesis at the Max Planck Institute for the Science of Light in Erlangen, Germany, and had a research stay at the Max Planck – University of Ottawa Centre for Extreme and Quantum Photonics in Ottawa, Canada.