Applied Physics B

, Volume 77, Issue 2, pp 177–183

Continuum generation of the third-harmonic pulse generated by an intense femtosecond IR laser pulse in air

  • N. Aközbek
  • A. Becker
  • M. Scalora
  • S.L. Chin
  • C.M. Bowden
Regular Paper

DOI: 10.1007/s00340-003-1199-2

Cite this article as:
Aközbek, N., Becker, A., Scalora, M. et al. Appl Phys B (2003) 77: 177. doi:10.1007/s00340-003-1199-2

Abstract

The continuum generation by intense femtosecond IR laser pulses focused in air including the effect of third-harmonic generation is investigated. We have used a theoretical model that includes the full spatio-temporal dynamics of both the fundamental and the third-harmonic pulses. Results of our numerical calculations show that a two-color filamentation effect occurs, in which the third-harmonic conversion efficiency remains almost constant over the whole filament length. It is found that this effect is rather independent of the wavelength of the input beam and the focal geometry. During the filamentation process the third-harmonic pulse itself generates a broad continuum, which can even overlap with the continuum of the fundamental pulse for the longer pump wavelengths. In consequence, the continuum generation generated by intense IR laser pulses is further extended into the UV.

Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • N. Aközbek
    • 1
  • A. Becker
    • 2
  • M. Scalora
    • 3
  • S.L. Chin
    • 4
  • C.M. Bowden
    • 3
  1. 1.Time Domain CorporationHuntsvilleUSA
  2. 2.Max-Planck-Institut für Physik komplexer SystemeDresdenGermany
  3. 3.AMSAM-WS-RD-STU.S. Army Aviation and Missile CommandHuntsvilleUSA
  4. 4.Département de Physique, de Génie Physique et d’Optique and Centre d’Optique, Photonique et LaserUniversité LavalQuébecCanada

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