Frequency-domain interferometer for measuring the phase and amplitude of a femtosecond pulse probing a laser-produced plasma.
A frequency-domain interferometer for probing the variations of the dielectric constant of a plasma with sub-100- fs temporal resolution and lambda/2000 phase resolution is described. Imaging the plasma on the entrance slit of a spectrograph provides spatial resolution along a diameter of the focal spot. The technique is used to map out the expansion of the critical density surface of a femtosecond laser-produced plasma with subnanometer spatial resolution along the laser axis.
Geindre
J P
JP
Audebert
P
P
Rousse
A
A
Falliès
F
F
Gauthier
J C
JC
Mysyrowicz
A
A
Santos
A D
AD
Hamoniaux
G
G
Antonetti
A
A