Diffraction of Gaussian and Laguerre–Gauss beams from a circular aperture using the moment expansion method
Résumé
A method based on the distribution theory is introduced to compute the Fresnel diffraction integral. It is applied to the diffraction of Gaussian and Laguerre–Gauss beams by a circular aperture. Expressions of the diffracting field are recast into a perturbation series describing the near- and far-field regions.
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