21 February 2017 Laser beam focusing through the scattering medium by means of adaptive optics
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Abstract
Laser beam propagation through the scattering suspension of polystyrene microspheres in distilled water was studied. The distorted laser beam was analyzed by both Shack-Hartmann sensor and CCD camera. The measured local slopes of the Poynting vector were compensated for by means of bimorph deformable mirror with 14 electrodes in order to increase the intensity of the focal spot in the far-field. Three different techniques for laser beam focusing were implemented and compared: LSQ fit-error minimization by Shack-Hartmann sensor, Hill-climbing optimization by Shack-Hartmann sensor and Hill-climbing optimization by far-field CCD camera.
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Ilya Galaktionov, Alexis Kudryashov, Julia Sheldakova, Alexander Nikitin, "Laser beam focusing through the scattering medium by means of adaptive optics", Proc. SPIE 10073, Adaptive Optics and Wavefront Control for Biological Systems III, 100731L (21 February 2017); doi: 10.1117/12.2256447; https://doi.org/10.1117/12.2256447
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