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Proceedings Paper

The use of modified hill-climbing algorithm for laser beam focusing through the turbid medium
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Paper Abstract

We investigate the ability to focus the laser beam (λ=0.65μm) propagated through the scattering suspension of polystyrene microspheres in distilled water by means of bimorph deformable mirror. Shack-Hartmann sensor was used to measure the local slopes of the Poynting vector, while the CCD camera was used to measure the intensity of the focal spot in the farfield. Bimorph deformable mirror with 14 electrodes was applied in order to increase the intensity of the focal spot in the far-field. We investigated the efficiency of the laser beam focusing improvement by means of three techniques: LSQ fiterror minimization by Shack-Hartmann sensor, Hill-climbing optimization by Shack-Hartmann sensor and Hill-climbing optimization by far-field CCD camera.

Paper Details

Date Published: 20 February 2017
PDF: 14 pages
Proc. SPIE 10090, Laser Resonators, Microresonators, and Beam Control XIX, 100901K (20 February 2017); doi: 10.1117/12.2257447
Show Author Affiliations
Ilya Galaktionov, Institute of Geosphere Dynamics (Russian Federation)
Alexis Kudryashov, Institute of Geosphere Dynamics (Russian Federation)
Moscow Polytechnic Univ. (Russian Federation)
Julia Sheldakova, Institute of Geosphere Dynamics (Russian Federation)
Alexander Nikitin, Institute of Geosphere Dynamics (Russian Federation)


Published in SPIE Proceedings Vol. 10090:
Laser Resonators, Microresonators, and Beam Control XIX
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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