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Vortex beam generation based on a fiber array combining and propagation through a turbulent atmosphere
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Paper Abstract

We suggest a technique for generation of optical vortex beams with a variable orbital angular momentum based on a fiber laser array. The technique uses the phase control of each single subbeam. Requirements for the number of subbeams and the spatial arrangement for the vortex beam generation are determined. The propagation dynamics of a vortex beam synthesized is compared with that of a continuous Laguerre–Gaussian beam in free space and in a turbulent atmosphere. Spectral properties of a beam synthesized, which is represented as a superposition of different azimuth modes, are determined during its free-space propagation. It is shown that energy and statistical parameters coincide for synthesized and continuous vortex beams when propagating through a turbulent medium. Probability density functions of the beam intensity fluctuations are well approximated to a gamma distribution in the cases where the scintillation index is lower than unity independently of the beam type and observation point position relative to the propagation axis.

Paper Details

Date Published: 19 September 2016
PDF: 12 pages
Proc. SPIE 9979, Laser Communication and Propagation through the Atmosphere and Oceans V, 997908 (19 September 2016); doi: 10.1117/12.2237604
Show Author Affiliations
V. P. Aksenov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
V. V. Dudorov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
V. V. Kolosov, V.E. Zuev Institute of Atmospheric Optics (Russian Federation)
Tomsk Scientific Ctr. SB (Russian Federation)


Published in SPIE Proceedings Vol. 9979:
Laser Communication and Propagation through the Atmosphere and Oceans V
Alexander M. J. van Eijk; Christopher C. Davis; Stephen M. Hammel, Editor(s)

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Vortex beam generation based on a fiber array combining and propagation through a turbulent atmosphere



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