Applied Physics B

, Volume 68, Issue 4, pp 735–739

Femtosecond nonresonant degenerate four-wave mixing at atmospheric pressure and in a free jet

Authors

  • H.-M. Frey
    • Paul Scherrer Institute, General Energy Research, CH-5232 Villigen PSI, Switzerland (Fax: +41-56/310-4416, E-mail: hans-martin.frey@psi.ch)
  • P. Beaud
    • Paul Scherrer Institute, General Energy Research, CH-5232 Villigen PSI, Switzerland (Fax: +41-56/310-4416, E-mail: hans-martin.frey@psi.ch)
  • T. Gerber
    • Paul Scherrer Institute, General Energy Research, CH-5232 Villigen PSI, Switzerland (Fax: +41-56/310-4416, E-mail: hans-martin.frey@psi.ch)
  • B. Mischler
    • Paul Scherrer Institute, General Energy Research, CH-5232 Villigen PSI, Switzerland (Fax: +41-56/310-4416, E-mail: hans-martin.frey@psi.ch)
  • P.P. Radi
    • Paul Scherrer Institute, General Energy Research, CH-5232 Villigen PSI, Switzerland (Fax: +41-56/310-4416, E-mail: hans-martin.frey@psi.ch)
  • A.P. Tzannis
    • Paul Scherrer Institute, General Energy Research, CH-5232 Villigen PSI, Switzerland (Fax: +41-56/310-4416, E-mail: hans-martin.frey@psi.ch)
Regular paper

DOI: 10.1007/s003400050696

Cite this article as:
Frey, H., Beaud, P., Gerber, T. et al. Appl Phys B (1999) 68: 735. doi:10.1007/s003400050696

2

, N2, and CO2. For CO2 additional experiments have been performed at reduced pressure and in a molecular beam. By delaying the probe pulse a periodic recovery of the DFWM signal is observed. The period of these transients can be assigned unambiguously to rotational Raman transitions of the ground state within the laser bandwidth. The decay of the transients yields the collisional dephasing of the Raman-induced polarization. At zero delay also optical-field-induced birefringence of electronic nature contributes to the signal. The different time scales of the Raman and electronic effects allow us to estimate their relative strength.

PACS: 42.65.Dr

Copyright information

© Springer-Verlag 1999