Applied Physics B

, Volume 91, Issue 1, pp 45–48

Pressure independence of intensity clamping during filamentation: theory and experiment


DOI: 10.1007/s00340-008-2956-z

Cite this article as:
Bernhardt, J., Liu, W., Chin, S. et al. Appl. Phys. B (2008) 91: 45. doi:10.1007/s00340-008-2956-z


Because of the dynamic equilibrium between Kerr self-focussing and plasma induced defocusing and the inexistence of collisional ionization the critical intensity during femtosecond laser filamentation in air is independent of pressure. An analytical analysis is given which is justified by a direct experimental verification.

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • J. Bernhardt
    • 1
  • W. Liu
    • 1
    • 2
  • S.L. Chin
    • 1
  • R. Sauerbrey
    • 3
  1. 1.Centre d’Optique, Photonique et Laser (COPL) et le Département de Physique, de Génie Physique et d’OptiqueUniversité LavalQuébecCanada
  2. 2.Institute of Modern Optics, Nankai University, Key Laboratory of Opto-electronic Information Science and Technology, Education Ministry of ChinaTianjinP.R. China
  3. 3.Forschungszentrum Dresden-RossendorfDresdenGermany