Related Experiment Video
Updated: Aug 10, 2026

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
Published on: October 23, 2018
Light filaments in air for ultraviolet and infrared wavelengths
1Département de Physique Théorique et Appliquée, Commissariat à l'Energie Atomique, CEA/DAM Ile de France, BP 12, 91680 Bruyères-le-Châtel, France.
Abstract:
The propagation of femtosecond UV laser pulses in air is numerically shown to form intense light filaments over several tenths of Rayleigh lengths. We compare UV filamentation with IR filamentation and show that the balance of the physical processes supporting the filaments is identical in both cases. For IR and UV wavelengths, it is shown that the intensity in the filament and the density of the electron plasma created by ionization of air molecules reach similar values as high as 10(14) W/cm(2) and 10(17) cm(-3). Spectral data exhibit a large broadening in the IR filament and a limited one for UV, which justifies the white-light generation associated with IR filamentation only.
More Related Videos
06:16Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
Published on: April 25, 2019
10:06Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs
Published on: July 2, 2020
Related Concept Videos
Light as Energy
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit less...
The Electromagnetic Spectrum
Formation of Intermediate Filaments
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
The Electromagnetic Spectrum
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...