Laser system in an unstable optical resonator arrangement providing a shaped output beam intensity profile and the method of forming it

摘要

The present invention relates to a laser system and a method for generating a defined spatially shaped laser beam in an unstable laser resonator. A laser system for shaping a laser beam mode (7) in an unstable laser resonator comprising an active medium (3), characterized in that the active medium (3) comprises an excitation region (4), wherein the gain distribution is generated via the optical excitation beam spatial intensity profile. In a preferred embodiment, the system may further comprise a terminal excitation for introducing a spatially shaped optical excitation beam (6) into the active medium (3), and / or an active or passive loss adjustment element in the resonator, and / or The system of the present invention is capable of generating a homogeneous beam profile.