Abstract

A modified hill-climbing algorithm based on Zernike modes is used for laser beam correction. The algorithm adopts the Zernike mode coefficients, instead of the deformable mirror actuators’ voltages in a traditional hill-climbing algorithm, as the adjustable variables to optimize the object function. The effect of the mismatches between the laser beam and the deformable mirror both in the aperture size and the center position was analyzed numerically and experimentally to test the robustness of the algorithm. Both simulation and experimental results show that the mismatches have almost no influence on the laser beam correction, unless the laser beam exceeds the effective aperture of the deformable mirror, which indicates the good robustness of the algorithm.

© 2014 Optical Society of America

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