Laser and Particle Beams


ULIA-2 Special Issue

Single-shot spectral interferometry of femtosecond laser-produced plasmas


S.  REBIBO a1, J.-P.  GEINDRE a1, P.  AUDEBERT a1, G.  GRILLON a2, J.-P.  CHAMBARET a2 and J.-C.  GAUTHIER a1c1
a1 Laboratoire pour l'Utilisation des Lasers Intenses, UMR 7605 CNRS—Ecole polytechnique—CEA—Université Paris VI, Ecole polytechnique, 91128 Palaiseau, France
a2 Laboratoire d'Optique Appliquée, UMR 7639 CNRS—ENSTA—Ecole polytechnique, Batterie de l'Yvette, 91761 Palaiseau, France

Abstract

We use both a Fourier-transform-based analysis and time-retrieval calculations to get time-resolved measurements of the reflectivity and the phase shift of a chirped probe pulse interacting with a fs-laser-produced plasma by spectral interferometry in a single shot. We have devised a novel dual-quadrature Mach–Zehnder configuration in which wavefront division is used to obtain spatial fringes from the perturbed and unperturbed probe simultaneously. We demonstrate the capability of this technique with fully analyzed experimental data on the interaction of a femtosecond laser with C3H6 and C samples, showing 35-fs time resolution.

(Received December 5 2000)
(Accepted February 5 2001)


Correspondence:
c1 Address correspondence and reprint requests to: Jean-Claude Gauthier, Directeur-Adjoint du LULI, LULI, Ecole Polytechnique, Route de Saclay, 91128 Palaiseau, France,. E-mail: jean-claude.gauthier@polytechnique.fr