title: Performance of a thermal-piezoelectric deformable mirror under 6.2  kW continuous-wave operation.
abstract: The thermal-piezoelectric deformable mirror (TPDM) is a device employed to compensate for laser-induced mirror deformation and thermal lensing in high-power optical systems. The TPDM setup is a unimorph deformable mirror with thermal and piezoelectric actuation properties. Laser-induced thermal lensing is compensated for by heating of the TPDM. We show that this mirror can be applied to high-power laser systems of up to 6.2 kW laser power and high power densities of up to 2  kW/cm2. The piezoelectric stroke of the single actuators is between 1.5 and 4 μm and is not reduced by either the absorbed laser power or mirror heating.
authors: Claudia
authors: C
authors: Reinlein
authors: Michael
authors: M
authors: Appelfelder
authors: Matthias
authors: M
authors: Goy
authors: Klaus
authors: K
authors: Ludewigt
authors: Andreas
authors: A
authors: Tünnermann