Mitigating the cross talk of orbital angular momentum modes in free-space optical communication by using an annular vortex beam and a focusing mirror

Jiaxuan Cao; Huijian Liang; Yunqin Zhou; Gaofeng Wu; Xiaoyan Pang

doi:10.3389/fphy.2022.1013729

Frontiers in Physics (Oct 2022)

Mitigating the cross talk of orbital angular momentum modes in free-space optical communication by using an annular vortex beam and a focusing mirror

Jiaxuan Cao,
Huijian Liang,
Yunqin Zhou,
Gaofeng Wu,
Xiaoyan Pang

Affiliations

Jiaxuan Cao: School of Physics, Northwest University, Xi’an, China
Huijian Liang: China Academy of Space Technology, Xi’an, China
Yunqin Zhou: School of Physics, Northwest University, Xi’an, China
Gaofeng Wu: School of Physics, Northwest University, Xi’an, China
Xiaoyan Pang: School of Electronics and Information, Northwestern Polytechnical University, Xi’an, China

DOI: https://doi.org/10.3389/fphy.2022.1013729
Journal volume & issue: Vol. 10

Abstract

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The probability density analysis formula of the single orbital angular momentum (OAM) mode of an annular vortex beam with a focusing mirror in a turbulent atmosphere is derived theoretically, and the effects of different parameters on the OAM spectrum are investigated numerically, and the results show that the OAM diffusion of the annular vortex beam is weaker than the Gaussian vortex beam in a turbulent atmosphere under the same conditions, and the annular vortex beam with a focusing mirror can more effectively reduce the crosstalk of OAM modes. Our findings will be useful for improving FSO system performance.

Published in Frontiers in Physics

ISSN: 2296-424X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Physics
Website: https://www.frontiersin.org/journals/physics

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