Abstract:
A method and a system for scanning a time delay between a fîrst ultrafast optical pulse of duration shorter than 10 ps and a second ultrafast optical pulse of duration shorter than 10 ps, wherein said second ultrafast puise is submitted to an acousto-optic Bragg diffraction by an acoustic pulse in the bulk of an acousto-optic material and the delay scanning is produced by time variation of said acoustic puise in said material.