14 June 2006 Large-scale 3D structure and mechanical properties of rotating light beams
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Proceedings Volume 6254, Seventh International Conference on Correlation Optics; 625406 (2006) https://doi.org/10.1117/12.679901
Event: Seventh International Conference on Correlation Optics, 2005, Chernivsti, Ukraine
Abstract
Two types of paraxial light beams which show a sort of rotation around the propagation axis are studied. In beams with "intrinsic" rotation (e.g., superpositions of Laguerre-Gaussian modes having the same waist and Gaussian envelope radius) the transverse structure rotates during the free beam propagation because of certain internal reasons. The transverse structure experiences the self-similar transformation, in which every point of the beam cross section moves as if it performs a centrifugal fly-off due to inertia. In case of "extrinsic" rotation, a beam is set in rotation due to action of some rotatory optical system. Such beams can be represented as superpositions of angular harmonics with different frequencies. This "forced" rotation causes the angular momentum of the rotating beam which is proportional but directed oppositely to the angular velocity ofthe rotation. This mechanical feature is associated with the complicated 3D helical structure ofthe forcedly rotating beams.
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Aleksandr Bekshaev, Aleksandr Bekshaev, Aleksandr Karamoch, Aleksandr Karamoch, } "Large-scale 3D structure and mechanical properties of rotating light beams", Proc. SPIE 6254, Seventh International Conference on Correlation Optics, 625406 (14 June 2006); doi: 10.1117/12.679901; https://doi.org/10.1117/12.679901
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