5 September 2014 Active compensation of low-order aberrations with reflective beam shaper
Author Affiliations +
Optical Engineering, 53(9), 096103 (2014). doi:10.1117/1.OE.53.9.096103
Abstract
A reflective beam shaper is designed for the purpose of compensation of the low-order aberrations in high-power slab lasers. A proportional-integral-derivative (PID) control algorithm is used to control the optical parameters of a beam shaper for active compensation of low-order aberrations. Simulations of the PID algorithm show that different combinations of defocus, 0-deg astigmatism, and 45-deg astigmatism, which are the main contributors of beam aberrations in slab lasers, can be well compensated by variation of distance and rotation angle of mirrors. For a beam with large wave aberrations [peak-to-valley (PtV)=87.7λ , root-mean-square (RMS)=19λ ], the adjustment of distance between mirrors is less than 100 mm, and the rotation angle about the z-axis is <3.2  deg , and the wavefront distortion is reduced to a level (PtV=0.50λ , RMS=0.09λ ) that can be further corrected with one deformable mirror. The effectiveness and performance of low-order aberration compensation with the reflective beam shaper are also verified by experiments.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Wenguang Liu, Qiong Zhou, Fei Feng, Zongfu Jiang, "Active compensation of low-order aberrations with reflective beam shaper," Optical Engineering 53(9), 096103 (5 September 2014). http://dx.doi.org/10.1117/1.OE.53.9.096103
JOURNAL ARTICLE
6 PAGES


SHARE
KEYWORDS
Beam shaping

Mirrors

Reflectivity

Monochromatic aberrations

Deformable mirrors

High power lasers

Laser vision correction

RELATED CONTENT

Development of the Water Window Imaging X-Ray Microscope
Proceedings of SPIE (October 04 1994)
Focal plane based wavefront sensing with random DM probes
Proceedings of SPIE (September 01 2017)
CODEX optics
Proceedings of SPIE (July 20 2010)

Back to Top