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20242026
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physics.optics2026

Near single-cycle pulse generation using a cascaded all-bulk multi-pass cell compression system

Saga Westerberg, Gaspard Beaufort, Sara Rushe Palacios +5

We experimentally demonstrate the generation of sub-two-cycle optical pulses using a cascaded post-compression scheme based on two bulk multi-pass cells. Starting from 220 fs, 100…

physics.optics2026

Enhanced dynamic range spatio-spectral metrology of few-cycle laser pulses

Cristian Alexe, Aaron Liberman, Saga Westerberg +13

Accurate spatio-temporal and spatio-spectral metrology is critical to the characterization and use of ultra-short, high-power lasers. The emergence of few cycle pulses, with bandwi…

physics.optics2025

Compact, intense attosecond sources driven by hollow Gaussian beams

Rodrigo Martín-Hernández, Melvin Redon, Ann-Kathrin Raab +9

High-order harmonic generation (HHG) enables the up-conversion of intense infrared or visible femtosecond laser pulses into extreme-ultraviolet attosecond pulses. However, the high…

physics.optics2025

Influence of the laser pulse duration in high-order harmonic generation

Saga Westerberg, Melvin Redon, Ann-Kathrin Raab +10

High-order harmonic generation (HHG) in gases has been studied for almost 40 years in many different conditions, varying the laser wavelength, intensity, focusing geometry, target…

physics.optics2024

Energy scaling in a compact bulk multi-pass cell enabled by Laguerre-Gaussian single-vortex beams

Victor Koltalo, Saga Westerberg, Melvin Redon +5

We report pulse energy scaling enabled by the use of Laguerre-Gaussian single-vortex () beams for spectral broadening in a sub-40 cm long Herriott-type bulk multi-…