3 November 1999 Adaptive compensation of dynamic wavefront aberrations based on blind optimization technique
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Abstract
In this paper, we present experimental results of dynamic aberration correction based on gradient descend algorithms. The experimental setup included a 37-actuators piezoelectric deformable mirror to distort dynamically an input laser beam and a 37-element micromachined deformable membrane mirror to correct the resulting wavefront distortions. We generated time-varying aberrations using the first mirror and used the light power focused onto a pinhole as our optimization matrix. We programmed a computer to maximize this metric and control the shape of the micromachined deformable membrane mirror for wavefront correction. We implemented in this computer a simple gradient descend algorithm and a stochastic perturbation gradient descent algorithm. We present experimental data on the convergence and stability of this adaptive system for various conditions of dynamic turbulence.
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Vladimir I. Polejaev, Pierre R. Barbier, Gary W. Carhart, Mark L. Plett, David W. Rush, Mikhail A. Vorontsov, "Adaptive compensation of dynamic wavefront aberrations based on blind optimization technique", Proc. SPIE 3760, High-Resolution Wavefront Control: Methods, Devices, and Applications, (3 November 1999); doi: 10.1117/12.367580; https://doi.org/10.1117/12.367580
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