Laser device with Kerr effect based mode-locking and operation thereof

A method of generating laser pulses using a laser resonator with a thin disk laser medium and a Kerr medium, said method comprising the steps of

• adjusting a beam diameter of a circulating electric field in the thin disk laser medium in a first mode shaping section including multiple resonator mirrors, wherein the thin disk laser medium is providing one of the multiple resonator mirrors, and
• adjusting the beam diameter of the circulating electric field coupled into the Kerr medium in a second mode shaping section, wherein,
• the beam diameter of the circulating electric field in the first mode shaping section is adjusted by using a telescopic geometry including a combination of at least one convex resonator mirror and at least one concave resonator mirror, resonator mirrors having a concave-convex geometry, or a superposition of the telescopic geometry, or a superposition of the telescopic geometry and the concave-convex geometry, and
• the beam diameters of said circulating electric field in the thin disk laser medium and in the Kerr medium are adjusted independently of each other.