Abstract
A new technique of the digital sorting of Laguerre-Gauss (LG) modes by the radial number at a constant topological charge resulting from the perturbation of a composition of LG beams by a thin dielectric diaphragm with different aperture radii was proposed and experimentally implemented. The technique is based on a digital analysis of higher-order intensity moments. The digital amplitude spectrum makes it possible to recover the real LG modes and find the measure of uncertainty introduced by the perturbation by means of information entropy. Measurements showed that the correlation degree of the sorted beams is 0.92.
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Volyar, A., Bretsko, M., Akimova, Y., Egorov, Y. (2021). Mode Spectra and Vortex Beam Sorting via Digital Intensity Processing. In: Singh, K., Gupta, A.K., Khare, S., Dixit, N., Pant, K. (eds) ICOL-2019. Springer Proceedings in Physics, vol 258. Springer, Singapore. https://doi.org/10.1007/978-981-15-9259-1_11
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DOI: https://doi.org/10.1007/978-981-15-9259-1_11
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