WIAS Preprint No. 2046, (2014)

Impact of spatial inhomogeneities on on-axis pulse reconstruction in femtosecond filaments


  • Brée, Carsten
  • Kretschmar, Martin
  • Nagy, Tamas
  • Kurz, Heiko G.
  • Morgner, Uwe
  • Kovačev, Milutin

2010 Mathematics Subject Classification

  • 78A60

2008 Physics and Astronomy Classification Scheme

  • 42.65.-k 42.65.Jx 42.65.Re 52.38.Hb


  • pulse self-compression, femtosecond filamentation, nonlinear optics




We demonstrate a strong influence of the spatial beam profile on the vacuum-propagated on-axis pulse shapes for a femtosecond filament in argon. The effects can be minimized by transmitting the filament into the far-field by a laser-drilled pinhole setup. Using this method, we can monitor the pulse compression dynamics along the entire longitudinal extension of the filament, including the ionization-induced plasma channel.

Appeared in

  • J. Phys. B, 48 (2015) pp. 094002/1--094002/6.

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