Share Email Print
cover

Optical Engineering

Active compensation of low-order aberrations with reflective beam shaper
Author(s): Wenguang Liu; Qiong Zhou; Fei Feng; Zongfu Jiang
Format Member Price Non-Member Price
PDF $20.00 $25.00

Paper 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.

Paper Details

Date Published: 5 September 2014
PDF: 6 pages
Opt. Eng. 53(9) 096103 doi: 10.1117/1.OE.53.9.096103
Published in: Optical Engineering Volume 53, Issue 9
Show Author Affiliations
Wenguang Liu, National Univ. of Defense Technology (China)
Qiong Zhou, National Univ. of Defense Technology (China)
Fei Feng, National Univ. of Defense Technology (China)
Zongfu Jiang, National Univ. of Defense Technology (China)


© SPIE. Terms of Use
Back to Top