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Proceedings Paper

Beam cleanup technique based on stochastic parallel gradient descent wavefront control method
Author(s): Yonghui Liang; Sanhong Wang; Xuejun Long; Qifeng Yu
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Paper Abstract

The feasibility of realizing beam cleanup of high power lasers using stochastic parallel gradient descent (SPGD) wavefront control method has been demonstrated numerically. The numerical model of an adaptive optics system comprising a 44-element deformable mirror and a far-field system performance metric sensor is first setup which operates with the SPGD wavefront control method. The system is then used to correct for the dynamic aberrations of a laser beam where the phase screens of the beam are constructed from the simulation data of a high power laser system and are introduced into the light wave time sequentially according to the iteration rate of the SPGD wavefront controller. The correction results show that the beam cleanup system investigated here can effectively compensate for the dynamic aberrations of the laser beam involved.

Paper Details

Date Published: 6 February 2008
PDF: 8 pages
Proc. SPIE 6823, High-Power Lasers and Applications IV, 68230H (6 February 2008); doi: 10.1117/12.757094
Show Author Affiliations
Yonghui Liang, National Univ. of Defense Technology (China)
Sanhong Wang, National Univ. of Defense Technology (China)
Xuejun Long, National Univ. of Defense Technology (China)
Qifeng Yu, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 6823:
High-Power Lasers and Applications IV
Dianyuan Fan; Robert F. Walter, Editor(s)

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