Recently, two novel techniques for the extraction of the
phase-shift map (Tomassini et al. (2001). Applied
Optics 40, 35) and the electronic density map estimation
(Tomassini P. & Giulietti A. (2001). Optics Communication
199, 143–148) have been proposed. In this article,
we apply both methods to a sample laser–plasma interferogram
obtained with femtoseconds probe pulse, in an experimental setup
devoted to laser particle acceleration studies.