Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas

Becker A., Akozbek N., Vijayalakshmi K., ORAL E. N., Bowden C., Chin S.

APPLIED PHYSICS B-LASERS AND OPTICS, vol.73, no.3, pp.287-290, 2001 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 73 Issue: 3
  • Publication Date: 2001
  • Doi Number: 10.1007/s003400100637
  • Journal Name: APPLIED PHYSICS B-LASERS AND OPTICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.287-290
  • Istanbul University Affiliated: Yes

Abstract

We present results of measurements of fluorescence spectra due to the interaction of a Ti:sapphire laser pulse with N(2) molecules at different gas pressures and pulse energies. The analysis of the data together with the results of numerical simulations, using a propagation model, reveal signatures of the phenomena of intensity clamping and of re-focusing of the laser pulse at high gas pressure. The laser pulse energy for intensity clamping as a function of the gas pressure is determined.