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Measuring Topological Charge of Laguerre–Gaussian Beams With a Y-Shaped Aperture by Lanlin Ni; Songtao Chang; Haojie Xia is a Engineering article available to read on EtoBox.

What is Measuring Topological Charge of Laguerre–Gaussian Beams With a Y-Shaped Aperture about?

We study the diffraction pattern of a Laguerre-Gaussian (LG) beam passing through a Y-shaped aperture (YA), which can be used to measure the topological charge (TC) of such a beam. This paper confirms that the magnitude and sign of the TC of the LG beam can be measured with a YA. We also study the effect of the YA with different sizes on the diffraction pattern. In addition, YA diffraction itself can be used to verify the measurement results of the sign of TC. The experimental results agree well with the simulation results. The method is simple and reliable.

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Author

Lanlin Ni; Songtao Chang; Haojie Xia

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Published

2023

Language

EN

Field

Engineering (Physical Sciences)