Transverse ring formation of a focused femtosecond laser pulse propagatingin air

Authors
Chin, SL Akozbek, N Proulx, A Petit, S Bowden, CM
Citation
Sl. Chin et al., Transverse ring formation of a focused femtosecond laser pulse propagatingin air, OPT COMMUN, 188(1-4), 2001, pp. 181-186
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICS COMMUNICATIONS
ISSN journal
00304018 → ACNP
Volume
188
Issue
1-4
Year of publication
2001
Pages
181 - 186
Database
ISI
SICI code
0030-4018(20010201)188:1-4<181:TRFOAF>2.0.ZU;2-2
Abstract
We observe the formation of ring patterns of a focused femtosecond near IR laser pulse propagating in air before the geometrical focal point. These ri ngs are due to the combined effects of self-focusing and defocusing created by the generated plasma via multiphoton/tunnel ionization of air. Qualitat ive agreement is found with numerical simulations, using input conditions s imilar to those in the experiment. (C) 2001 Elsevier Science B.V. All right s reserved.