Transverse energy redistribution upon edge diffraction of a paraxial laser beam with optical vortex

Aleksandr Bekshaev; Kadhim Ameen Mohammed

doi:10.1117/12.2050875

17 December 2013 Transverse energy redistribution upon edge diffraction of a paraxial laser beam with optical vortex

Aleksandr Bekshaev, Kadhim Ameen Mohammed

Proceedings Volume 9066, Eleventh International Conference on Correlation Optics; 906602 (2013) https://doi.org/10.1117/12.2050875
Event: Eleventh International Conference on Correlation Optics, 2013, Chernivsti, Ukraine

Abstract

We present the results of the numerical investigation of the transverse profile evolution for a beam obtained by the edge diffraction of a circular Laguerre-Gaussian mode. It is shown that the energy penetrates into the geometric shadow region asymmetrically, which testifies for the transverse energy circulation in the incident beam. The intensity profile shows the “overall” rotation in agreement with the energy circulation handedness. The phase profile of the diffracted beam is characterized by the system of singularities (optical vortices) that migrate over the beam cross section and participate in topological reactions of emergence and/or annihilation. In the far field, the beam profile structure is simplified and becomes symmetric with respect to the axis orthogonal to the screen edge. No matter which part of the Laguerre-Gaussian beam is stopped by the screen, the far-field profile contains the optical vortex of the same sense as the incident one.

Citation Download Citation

Aleksandr Bekshaev and Kadhim Ameen Mohammed "Transverse energy redistribution upon edge diffraction of a paraxial laser beam with optical vortex", Proc. SPIE 9066, Eleventh International Conference on Correlation Optics, 906602 (17 December 2013); https://doi.org/10.1117/12.2050875

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