Curve-shaped ultrashort laser pulses with programmable spatiotemporal behavior

PLUTO / PLUTO-2 Spatial Light Modulators
Adaptive Optics / Wavefront Control Pulse Application / -Shaping
Published on:
Authors: Enar Franco, Óscar Martínez-Matos, and José A. Rodrigo
Abstract:
“Structured ultrashort laser pulses with controlled spatiotemporal properties are emerging as a key tool for the study and application of light–matter interactions in different fields such as microscopy, time-resolved imaging, laser micromachining, particle acceleration, and attosecond science. In practice, a structured ultrashort pulse focused along a target trajectory with controlled pulse dynamics is required, e.g., to set the trajectory and velocity of the resulting intensity peak. Here, to address this challenging problem, we present a technique and experimental setup that allows straightforward engineering of structured ultrashort laser pulses with control of their spatiotemporal properties enabling tailored pulse propagation dynamics along the target trajectory. Our theoretical framework describes the design and control of this kind of curve-shaped laser pulse in terms of the curve geometry and phase prescribed along it. We have derived a closed-form expression that describes the interplay between the curve geometry and prescribed phase governing the pulse dynamics, including the temporal behavior of the pulse peak intensity while preserving the pulse duration. The theoretical results and the corresponding numerical simulations allow us to analyze the pulse dynamics on the example of femtosecond curve-shaped vortex pulses, including contour-shaped pulses created to follow the outline of objects at micrometer scale. The experimental results demonstrate the generation of these structured ultrashort pulses. These findings could pave the way for the next generation of ultrashort laser-based optical tools for the study and control of light–matter interactions.”

Open Access

Publication: Optica
Issue/Year: Optica, Volume 10; Number 3; Pages 379–392; 2023
DOI: 10.1364/OPTICA.478086
Link: https://doi.org/10.1364/OPTICA.478086

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