Piezoelectricity

Physics

Deformable mirror

Flatness (cosmology)

Laser

Plane mirror

Aperture (computer memory)

Optics

Adaptive optics

Laser beam quality

Wavefront

Composite material

Acoustics

Materials science

Cosmology

Bimorph

Quantum mechanics

Laser beams

Wavefront sensor

Applied Sciences

The bimorph deformable mirror with a diameter of 320 mm, including 127 control electrodes, has been developed and tested. The flatness of the initial mirror surface of about 1 μm (P-V) was achieved by mechanically adjusting the mirror substrate fixed in the metal mount. To correct for the aberrations and improve the beam focusing in the petawatt Ti:Sa laser, the wide-aperture adaptive optical system with the deformable mirror and Shack–Hartmann wavefront sensor was developed. Correction of the wavefront aberrations in the 4.2 PW Ti:Sa laser using the adaptive system provided increases the intensity in the focusing plane to a value of 1.1 × 1023 W/cm2

Wide-Aperture Bimorph Deformable Mirror for Beam Focusing in 4.2 PW Ti:Sa Laser