Control of laser radiation parameter

Spatiotemporal dynamics of femtosecond laser pulses during apodization by a serrated diaphragm

M. A. Zolotavin, A. A. Soloviev

Federal Research Center A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod

Abstract: We report a numerical investigation of the spatiotemporal dynamics of a femtosecond laser pulse after aperture separation on a circular serrated diaphragm and a spatial filter. It is found that the use of serrated diaphragms together with a spatial filter can markedly reduce the negative impact of diffraction effects on the spatiotemporal dynamics of the pulse. Criteria are formulated to determine the parameters of the separation scheme in order to avoid significant distortions of the radiation properties during subsequent focusing.

Keywords: serrated diaphragms, apodization, femtosecond pulses, diffraction, spatial filters.

Received: 11.09.2024
Revised: 25.12.2024

 English version: Quantum Electronics, 2025, 52:suppl. 3, S238–S246