Evolution and termination of a femtosecond laser filament in air.
The evolution of the filamentation of a femtosecond laser pulse in air is measured. The divergence of the filament core is almost constant over a long distance, encompassing a zone with efficient ionization followed by another where ionization is much weaker. At the end, the core diverges out linearly with a low divergence due to self-spatial filtering.
Chen
Yanping
Y
Centre d'Optique, Photonique et Laser (COPL) and Département de physique, Université Laval, Québec, Québec G1K 7P4, Canada. yanping.chen1@ulaval.ca
Théberge
Francis
F
Kosareva
Olga
O
Panov
Nikolay
N
Kandidov
Valerii P
VP
Chin
See Leang
SL