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Proceedings Paper

Simulated annealing algorithm applied in adaptive near field beam shaping
Author(s): Zhan Yu; Hao-tong Ma; Shao-jun Du
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Paper Abstract

Laser beam shaping is required in many applications for improving the efficiency of the laser systems. In this paper, the near field beam shaping based on the combination of simulated annealing algorithm and Zernike polynomials is demonstrated. Considering phase distribution can be represented by the expansion of Zernike polynomials, the problem of searching appropriate phase distribution can be changed into a problem of optimizing a vector made up of Zernike coefficients. The feasibility of this method is validated theoretically by translating the Gaussian beam into square quasi-flattop beam in the near field. Finally, the closed control loop system constituted by phase only liquid crystal spatial light modulator and simulated annealing algorithm is used to prove the validity of the technique. The experiment results show that the system can generate laser beam with desired intensity distributions.

Paper Details

Date Published: 5 November 2010
PDF: 8 pages
Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 78480Q (5 November 2010); doi: 10.1117/12.871683
Show Author Affiliations
Zhan Yu, National Univ. of Defense Technology (China)
Hao-tong Ma, National Univ. of Defense Technology (China)
Shao-jun Du, National Univ. of Defense Technology (China)

Published in SPIE Proceedings Vol. 7848:
Holography, Diffractive Optics, and Applications IV
Yunlong Sheng; Chongxiu Yu; Linsen Chen, Editor(s)

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