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Proceedings Paper

Active mirrors for intra-cavity compensation of the aspherical thermal lens in thin-disk lasers
Author(s): Stefan Piehler; Birgit Weichelt; Andreas Voss; Marwan Abdou Ahmed; Thomas Graf
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Paper Abstract

With the development of the thin-disk laser, thermal lensing issues have been drastically reduced. However, fundamental mode operation at high output powers is still limited by severe efficiency reductions due to diffraction losses introduced by the temperature gradient at the boundary of the pump spot. To countervail these aspherical wavefront deformations, high-power laser mirrors featuring deformable surfaces have been developed. The surface of these mirrors resembles the shape of the thermally induced change of optical path length in the pumped laser crystal. The magnitude of the surface deformation can be actively controlled to provide optimal compensation at different power levels.

Paper Details

Date Published: 6 February 2012
PDF: 6 pages
Proc. SPIE 8236, Laser Resonators, Microresonators, and Beam Control XIV, 82360J (6 February 2012); doi: 10.1117/12.905876
Show Author Affiliations
Stefan Piehler, Univ. Stuttgart (Germany)
Birgit Weichelt, Univ. Stuttgart (Germany)
Andreas Voss, Univ. Stuttgart (Germany)
Marwan Abdou Ahmed, Univ. Stuttgart (Germany)
Thomas Graf, Univ. Stuttgart (Germany)

Published in SPIE Proceedings Vol. 8236:
Laser Resonators, Microresonators, and Beam Control XIV
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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