Beam quality measurement through off-axis optical vortex

Mateusz Szatkowski; Agnieszka Popiolek-Masajada; J. Masajada

doi:10.1117/12.2529779

9 September 2019 Beam quality measurement through off-axis optical vortex

Mateusz Szatkowski, Agnieszka Popiolek-Masajada, J. Masajada

Proceedings Volume 11107, Laser Beam Shaping XIX; 1110703 (2019) https://doi.org/10.1117/12.2529779
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

One of the challenges for every optical system is preserving the quality of the used beam, which may be significantly reduced, due to the low condition of used optical elements or their misalignment. There are plenty of methods focused on correction of the final beam, depending on the used entire optical system. Problem of efficient beam evaluation is just as important. So far, most of the measurements, are based on visual inspection, which is not always enough, especially when the high quality of the beam is required. Novel approaches use structured light to increase beam sensitivity for any imperfections. In this paper we present approach, which uses optical vortex shifted off-axis for a beam quality measurement. It uses SLM as a vortex generating element, which is shifted off-axis by proper hologram transformation. Tracking of the vortex trajectory may provide information about beam quality and aberration of optical system. The new vortex localization algorithm will be presented.

Conference Presentation

Citation Download Citation

Mateusz Szatkowski, Agnieszka Popiolek-Masajada, and J. Masajada "Beam quality measurement through off-axis optical vortex", Proc. SPIE 11107, Laser Beam Shaping XIX, 1110703 (9 September 2019); https://doi.org/10.1117/12.2529779

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