Applied Physics B

, Volume 80, Issue 1, pp 35–38

Effect of beam diameter on the propagation of intense femtosecond laser pulses

  • Q. Luo
  • S.A. Hosseini
  • W. Liu
  • J.-F. Gravel
  • O.G. Kosareva
  • N.A. Panov
  • N. Aközbek
  • V.P. Kandidov
  • G. Roy
  • S.L. Chin
Article

DOI: 10.1007/s00340-004-1692-2

Cite this article as:
Luo, Q., Hosseini, S., Liu, W. et al. Appl. Phys. B (2005) 80: 35. doi:10.1007/s00340-004-1692-2

Abstract

This paper describes the effects observed during the propagation of intense femtosecond laser pulses in air following the modification of the laser beam diameter with a pair of convex–concave lenses placed/mounted in a telescopic configuration. We observed that by reducing the diameter of the beam the detected back-scattered nitrogen fluorescence from the filaments becomes more stable on a shot-to-shot basis while, for a larger beam size, greater fluctuations are observed that are not correlated to shot-to-shot fluctuations in the laser pulse energy. This result leads to a new method to control the fluorescence signal which can be very important in remote-sensing applications.

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Q. Luo
    • 1
  • S.A. Hosseini
    • 1
  • W. Liu
    • 1
  • J.-F. Gravel
    • 1
  • O.G. Kosareva
    • 2
  • N.A. Panov
    • 2
  • N. Aközbek
    • 3
  • V.P. Kandidov
    • 2
  • G. Roy
    • 4
  • S.L. Chin
    • 1
  1. 1.Centre d’Optique, Photonique et Laser (COPL) et Département de Physiquede Génie Physique et d’Optique, Université LavalQuébecCanada
  2. 2.International Laser Center, Physics DepartmentM.V. Lomonosov Moscow State UniversityMoscowRussia
  3. 3.Time Domain CorporationHuntsvilleUSA
  4. 4.The Remote Sensing Group of the Defense Research and Development Center Valcartier (DRDC Valcartier)Val-BelairCanada