Device for generating a short duration laser pulse

摘要

An embodiment relates to a device for generating a short duration laser pulse, which comprises: means for generating a laser beam and for filtering same, 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 pulse 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 a break integral B lower than three when the input beam passes through the transparent slide.

主权项

1. 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⁢πλ⁢∫0l⁢n2⁡(z)·I⁡(z)⁢ⅆz,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.