Abstract
A successful beam cleanup of a 5-mJ/200-µs pulsed solid-state laser system
operating at 532-nm wavelength is demonstrated. In this beam cleanup system, a
wave-front sensor-less adaptive optics (AO) system is set up with a 20-element
bimorph mirror (BM), a high-voltage amplifier, a charge-coupled device camera, and a
control software implementing the stochastic parallel gradient descent (SPGD)
algorithm. The brightness of the laser focal spot is improved because the wave-front
distortions have been compensated. The performance of this system is presented and
the experimental results are analyzed.
© 2012 Chinese Optics Letters
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