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Эта публикация цитируется в 6 научных статьях (всего в 6 статьях)
SHORT COMMUNICATIONS
Vortex-free laser beam with an orbital angular momentum
V. V. Kotlyarab, A. A. Kovalevab a Samara National Research University
b Image Processing Systems Institute of the RAS - Branch of the FSRC "Crystallography and Photonics" RAS, Samara, Russia
Аннотация:
We show that if one cylindrical lens is placed in the Gaussian beam waist and another cylindrical lens is placed at some distance from the first one and rotated by some angle, then the laser beam after the second lens has an orbital angular momentum (OAM). An explicit analytical expression for the OAM of such a beam is obtained. Depending on the inter-lens distance, the OAM can be positive, negative, or zero. Such a laser beam has no isolated intensity nulls with a singular phase and it is not an optical vortex, but has an OAM. By choosing the radius of the beam waist of the source Gaussian beam, the focal lengths of the lenses and the distance between them, it is possible to generate a vortex-free laser beam equivalent to an optical vortex with a topological charge of several hundreds.
Ключевые слова:
elliptic Gaussian beam, cylindrical lens, orbital angular momentum.
Поступила в редакцию: 25.05.2017 Принята в печать: 22.06.2017
Образец цитирования:
V. V. Kotlyar, A. A. Kovalev, “Vortex-free laser beam with an orbital angular momentum”, Компьютерная оптика, 41:4 (2017), 573–576
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/co422 https://www.mathnet.ru/rus/co/v41/i4/p573
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