Device for generating a short duration laser pulse

A device for generating a short duration laser pulse, which comprises:

• means for generating a laser beam arranged in such a way as to generate an input laser beam providing an input laser pulse
• a transparent slide comprising a non-linear scattering material
• the laser generation means being arranged so that the slide widens the spectrum of the input laser beam by phase self-modulation, in order to generate a wide-spectrum laser pulse
• compression means adapted for compressing the wide-spectrum laser pulse in order to generate a short duration laser pulse
• wherein the laser generation means are arranged so that the input beam is spatially uniform on the transparent slide and has an Integral B lower than three when the input beam passes through the transparent slide, wherein the Integral B is defined by the following equation:
• Integral
• ⁢
• ⁢
• B
• =
• 2
• ⁢
• π
• λ
• ⁢
• ∫
• 0
• l
• ⁢
• n
• 2
• ⁡
• (
• z
• )
• ·
• I
• ⁡
• (
• z
• )
• ⁢
• ⅆ
• z
• ,
• wherein λ is the wavelength of the input beam passing through the transparent slide in direction z, I is the thickness of the transparent slide, n2(z) is the non-linear refraction index of the transparent slide and I(z) is the power density of the input beam.