A-M Talposi, V Iancu, D Ursescu [ https://www.mdpi.com/2304-6732/9/6/389 ]
Photonics Magazine recently published an article by our colleagues: Ana-Maria Talposi, Vicentiu Iancu and Daniel Ursescu, scientific researchers at ELI-NP entitled: "Influence of Spatio-Temporal Couplings on Focused Optical Vortices".
The article addresses for the first time in a systematic manner the combined contribution of the spatio-temporal distortions in ultrashort pulses and helical wavefront. It points out the rotation of the singularity in the optical vortex in the presence of the spatial chirp, angular chirp and pulse front tilt.
The paper is a follow up of the one published at the beginning of this year 2022 in Journal of the Optical Society of America A: Anda-Maria Talposi and Daniel Ursescu, "Propagation of ultrashort laser fields with spatiotemporal couplings using Gabor's Gaussian complex decomposition".
Irradiance profile in the focal region, of the laser field (|E|2) with initial Pulse Front Tilt of 0.8 fs/mm, after being reflected by the helical mirror and by a focusing mirror of f = 1500 mm. The isosurface was chosen at 2% of the maximum.
(a) The phase profile and (b) the fluence profile (time-integrated |E|^2) of the laser field after being reflected by the helical mirror, in the near field at z = 0.
