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6 February 2008 Beam cleanup technique based on stochastic parallel gradient descent wavefront control method
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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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yonghui Liang, Sanhong Wang, Xuejun Long, and Qifeng Yu "Beam cleanup technique based on stochastic parallel gradient descent wavefront control method", Proc. SPIE 6823, High-Power Lasers and Applications IV, 68230H (6 February 2008); https://doi.org/10.1117/12.757094
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