Article,

Deformable mirrors for intra-cavity use in high-power thin-disk lasers

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Optics Express, 25 (4): 4254--4267 (February 2017)
DOI: 10.1364/OE.25.004254

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 &\#x02212;0.7 m&\#x02212;1 to 0.3 m&\#x02212;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.

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