Device for generating a laser beam having a homogenized cross section and use of this beam

摘要

A device designed for generating a laser beam having a homogenized cross section has the following features: a) a pulsed solid-state laser with an emission in a wavelength range of between 2 and 3 mu m, b) a pulse energy of between 100 mu J and 1 J, c) a transmission fiber made of a material transparent to the wavelength and having a length of at least 0.2 m and a diameter of between 50 and 1000 mu m, d) an end piece made of quartz or sapphire and having a length of between 4 and 50 mm, the end piece following the fiber and having plane end surfaces arrange perpendicular to the longitudinal direction.