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Proceedings Paper

Adaptive compensation of dynamic wavefront aberrations based on blind optimization technique
Author(s): Vladimir I. Polejaev; Pierre R. Barbier; Gary W. Carhart; Mark L. Plett; David W. Rush; Mikhail A. Vorontsov
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Paper 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.

Paper Details

Date Published: 3 November 1999
PDF: 8 pages
Proc. SPIE 3760, High-Resolution Wavefront Control: Methods, Devices, and Applications, (3 November 1999); doi: 10.1117/12.367580
Show Author Affiliations
Vladimir I. Polejaev, Army Research Lab. (United States)
Pierre R. Barbier, Lab. for Physical Sciences and Univ. of Maryland/College Park (United States)
Gary W. Carhart, Army Research Lab. (United States)
Mark L. Plett, Lab. for Physical Sciences and Univ. of Maryland/College Park (United States)
David W. Rush, Lab. for Physical Sciences (United States)
Mikhail A. Vorontsov, Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 3760:
High-Resolution Wavefront Control: Methods, Devices, and Applications
John D. Gonglewski; Mikhail A. Vorontsov, Editor(s)

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