Comparison of efficiency of bimorph mirror and spatial light modulator for laser beam focusing through a moderately scattering medium

Ilya Galaktionov; Julia Sheldakova; Alexander Nikitin; Alexis Kudryashov

doi:10.1117/12.2575723

12 November 2020 Comparison of efficiency of bimorph mirror and spatial light modulator for laser beam focusing through a moderately scattering medium

Ilya Galaktionov, Julia Sheldakova, Alexander Nikitin, Alexis Kudryashov

Author Affiliations +

Proceedings Volume 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 115602A (2020) https://doi.org/10.1117/12.2575723
Event: 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020, Moscow, Russian Federation

Abstract

Increasing of the focusing efficiency of partially coherent laser radiation propagated through a scattering medium was investigated. To improve focusing of scattered laser beam, we applied bimorph deformable mirror with 48 control electrodes and LCOS-SLM with 1920×1080 pixels resolution and compared their efficiencies. We used 5 mm thick glass cuvette filled with the suspension of 1 um polystyrene microspheres, diluted in distilled water. The concentration of scatterers were varied from 10⁵ to 10⁶ mm^-3 . According to principle of similarity a medium with such parameters can be considered as an equivalent to the middle-density fog layer with the length ranging from 300 meters up to 5 kilometers. Numerical and experimental investigation of the focusing improvement showed that it is possible to increase the peak intensity of the focal spot up to 60%.

Citation Download Citation

Ilya Galaktionov, Julia Sheldakova, Alexander Nikitin, and Alexis Kudryashov "Comparison of efficiency of bimorph mirror and spatial light modulator for laser beam focusing through a moderately scattering medium", Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 115602A (12 November 2020); https://doi.org/10.1117/12.2575723

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