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Ptychography-based characterization of wavelength-tunable vortex beams

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Abstract

We demonstrate monochromatic ptychographic reconstructions of vortex beams within a range of 0.2λ0. Modal decomposition of the vortices reveal that the pu-rity of the dominant LG01 mode exceeds 85% for the full investigated bandwidth.

© 2021 The Author(s)

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