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Updated: May 14, 2026

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
Published on: April 25, 2019
White light generation over three octaves by femtosecond filament at 3.9 µm in argon
Daniil Kartashov1, Skirmantas Ališauskas, Audrius Pugžlys
1Photonics Institute, Vienna University of Technology, Vienna, Austria. daniil.kartashov@tuwien.ac.at
Abstract:
We report the first (to our knowledge) experimental results and numerical simulations on mid-IR femtosecond pulse filamentation in argon using 0.1 TW peak-power, 80 fs, 3.9 μm pulses. A broadband supercontinuum spanning the spectral range from 350 nm to 5 μm is generated, whereby about 4% of the mid-IR pulse energy is converted into the 350-1700 nm spectral region. These mid-IR-visible coherent continua offer a new, unique tool for time-resolved spectroscopy based on a mid-IR filamentation laser source.
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