title: Deformable mirrors for intra-cavity use in high-power thin-disk lasers.
abstract: We present deformable mirrors for the intra-cavity use in high-power thin-disk laser resonators. The refractive power of these mirrors is continuously adaptable from -0.7 m-1to 0.3 m-1, corresponding to radii of curvature ranging between 2.86 m (convex) and 6.67 m (concave). The optimized shape of the mirror membrane enables a very low peak-to-valley deviation from a paraboloid deformation over a large area. With the optical performance of our mirrors being equal to that of standard HR mirrors, we were able to demonstrate the tuning of the beam quality of a thin-disk laser in a range of M2= 3 to M2= 1 during laser operation at output powers as high as 1.1 kW.
authors.forename: Stefan
authors.initials: S
authors.lastname: Piehler
authors.forename: Tom
authors.initials: T
authors.lastname: Dietrich
authors.forename: Philipp
authors.initials: P
authors.lastname: Wittmüss
authors.forename: Oliver
authors.initials: O
authors.lastname: Sawodny
authors.forename: Marwan Abdou
authors.initials: MA
authors.lastname: Ahmed
authors.forename: Thomas
authors.initials: T
authors.lastname: Graf