Transverse evolution of a plasma channel in air induced by a femtosecond laser.
We investigate the evolution of filamentation in air by using a longitudinal diffraction method and a plasma fluorescence imaging technique. The diameter of a single filament in which the intensity is clamped increases as the energy of the pump light pulse increases, until multiple filaments appear.
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China. ypdeng@mail.siom.ac.cn
Y P
YP
Deng
J B
JB
Zhu
Z G
ZG
Ji
J S
JS
Liu
B
B
Shuai
R X
RX
Li
Z Z
ZZ
Xu
F
F
Théberge
S L
SL
Chin