Phase-only spatial light modulator for focusing a moderately scattered visible range laser beam

Ilya Galaktionov; Julia Sheldakova; Alexander Nikitin; Vladimir Toporovsky; Alexis Kudryashov

doi:10.1117/12.2631997

3 October 2022 Phase-only spatial light modulator for focusing a moderately scattered visible range laser beam

Ilya Galaktionov, Julia Sheldakova, Alexander Nikitin, Vladimir Toporovsky, Alexis Kudryashov

Proceedings Volume 12218, Laser Beam Shaping XXII; 1221808 (2022) https://doi.org/10.1117/12.2631997
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Phase-only spatial light modulator with Full HD resolution was applied to focus laser radiation that passed through the thick layer of the scattering suspension. Polystyrene microbeads of 1 μm diameter diluted in distilled water was used as a scattering medium. The concentration values of the suspension were varied from 105 to 106 mm-3. In order to analyze the intensity distribution of the focal spot in the far-field a CCD camera with micro-objective was used. Shack-Hartmann sensor was used to analyze the wavefront distortions caused by the scattering medium. We demonstrated that the assembled experimental setup can increase the integral intensity of the focused light by approximately 10% while simultaneously decrease the focal spot size by approximately 20%.

Conference Presentation

Citation Download Citation

Ilya Galaktionov, Julia Sheldakova, Alexander Nikitin, Vladimir Toporovsky, and Alexis Kudryashov "Phase-only spatial light modulator for focusing a moderately scattered visible range laser beam", Proc. SPIE 12218, Laser Beam Shaping XXII, 1221808 (3 October 2022); https://doi.org/10.1117/12.2631997

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