The femtosecond laser has a high energy pulse to another and time

摘要

The present invention relates to a system (1) for generating a laser pulse of duration reduced comprising: means for generating (3) of a laser beam on the input pulse providing a femtosecond laser (4) has, propagating along an axis z, spatially uniform in amplitude; • a transparent blade (5) positioned secant to the z axis of propagation of the pulse, the laser pulse having a power density per unit area such that it induces an auto phase modulation during the passage of the pulse in the transparent blade so as to generate a laser pulse to be widened spectrum; • of the compression means (7) arranged so as to compress the laser pulse to be widened spectrum so as to generate a laser pulse of duration reduced. The system is such that the generation means (3) of the incoming laser beam are adapted so that the pulse has a higher energy than 1 j, and the transparent blade (5) is formed of a flexible transparent film.