Generation of long range low-divergent Gauss–Bessel beams by annihilating optical vortices

Bessel beams are remarkable since they do not diverge. Accordingly, they have numerous applications ranging from precision laser micro-machining to laser particle acceleration. We demonstrate a novel approach for generating long-range Gauss–Bessel beams. A ring-shaped beam is produced by imprinting...

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Bibliographic Details
Published in:Optics communications 2021-02, Vol.480, p.126510, Article 126510
Main Authors: Stoyanov, Lyubomir, Zhekova, Maya, Stefanov, Aleksander, Ivanov, Boris, Stefanov, Ivan, Paulus, Gerhard G., Dreischuh, Alexander
Format: Article
Language:English
Subjects:
Bessel beam
Gauss–Bessel beam
Non-diffracting beams
Optical vortex
Self-healing
Structured beam
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Summary:Bessel beams are remarkable since they do not diverge. Accordingly, they have numerous applications ranging from precision laser micro-machining to laser particle acceleration. We demonstrate a novel approach for generating long-range Gauss–Bessel beams. A ring-shaped beam is produced by imprinting a vortex with high topological charge in a Gaussian beam. The phase singularities are thereafter removed and the ring-shaped beam focused/Fourier-transformed by a thin lens. This results in a remarkably good realization of a Gauss–Bessel beam. Divergence angles in the microradian range and Gauss–Bessel beam lengths up to 2.5 m behind the focal plane of the lens are demonstrated.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2020.126510