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Updated: Aug 18, 2026

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
Published on: April 25, 2019
Chirp-induced dynamics of femtosecond filaments in air
Rachel Nuter1, Stefan Skupin, Luc Bergé
1Département de Physique Théorique et Appliquée, Commissariat à l'Energie Atomique, Direction des Applications Militaires--Ile de France, BP 12, 91680 Bruyères-le-Châtel, France. rachel.nuter@cea.fr
Abstract:
We investigate the influence of a chirped phase on femtosecond pulses propagating in air. Pulses with an initially negative chirp are temporally compressed by compensation with group-velocity dispersion. We demonstrate that this property, combined with plasma defocusing, can be used to trigger filamentation at different foci, increase self-guiding ranges, or even shorten pulse duration.

