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physics.optics2021★ 5 cited
Coherent superposition of orthogonal modes
Klaus Floettmann
The coherent superposition of orthogonal modes can result in transverse offsets, variations of the Rayleigh length and a reduction of the beam quality factor of the coherent sum of…
physics.optics2020★ 7 cited
Equivalence of Gouy and Courant-Snyder phase
Klaus Floettmann
The generation of electron vortex beams and the conversion of these beams into beams without angular momentum by means of astigmatic optical systems, or vice versa, has been pursue…