[HTML][HTML] Orbital angular momentum of light for communications

AE Willner, K Pang, H Song, K Zou, H Zhou - Applied Physics Reviews, 2021 - pubs.aip.org
Structured light, especially beams carrying orbital angular momentum (OAM), has gained
much interest due to its unique amplitude and phase structures. In terms of communication …

[HTML][HTML] Symmetry and quantum features in optical vortices

DL Andrews - Symmetry, 2021 - mdpi.com
Optical vortices are beams of laser light with screw symmetry in their wavefront. With a
corresponding azimuthal dependence in optical phase, they convey orbital angular …

Orbital angular momentum beams for high-capacity communications

AE Willner, H Song, K Zou, H Zhou… - Journal of Lightwave …, 2022 - ieeexplore.ieee.org
There is a growing interest in structured light, especially orbital angular momentum (OAM)
beams, due to its unique amplitude and phase structure. Multiple orthogonal OAM beams …

All-optical signal processing of vortex beams with diffractive deep neural networks

Z Huang, P Wang, J Liu, W Xiong, Y He, J Xiao, H Ye… - Physical Review …, 2021 - APS
Vortex beams (VBs), possessing a helical phase front and carrying orbital angular
momentum (OAM), have attracted considerable attention in optical communications for their …

Performance enhancement of an orbital-angular-momentum-multiplexed free-space optical link under atmospheric turbulence effects using spatial-mode multiplexing …

BB Yousif, EE Elsayed - IEEE access, 2019 - ieeexplore.ieee.org
In this paper, we propose an adaptive multiple-input-multiple-output (MIMO) free-space
optical (FSO) links using an orbital-angular-momentum (OAM)-multiplexed based on the …

Atmospheric turbulence mitigation using spatial mode multiplexing and modified pulse position modulation in hybrid RF/FSO orbital-angular-momentum multiplexed …

BB Yousif, EE Elsayed, MM Alzalabani - Optics Communications, 2019 - Elsevier
In this paper, the capacity of a free-space optical (FSO) communication over radio frequency
(RF) could potentially be increased by the simultaneous transmission of multiple orbital …

Free-space optical communication with quasi-ring Airy vortex beam under limited-size receiving aperture and atmospheric turbulence

L Zhu, A Wang, M Deng, B Lu, X Guo - Optics Express, 2021 - opg.optica.org
Vortex beams carrying orbital angular momentum (OAM), which feature helical wavefronts,
have been regarded as an alternative degree of freedom for free-space optical (FSO) …

[HTML][HTML] Capacity enhancement analysis of an OAM-OFDM-SMM multiplexed free space communication system in atmospheric turbulence

S Sinha, C Kumar, A Armghan, M Singh, M Alsharari… - Applied Sciences, 2023 - mdpi.com
To overcome atmospheric turbulence (AT) distortion during signal propagation through the
optical link, orbital angular momentum (OAM) mode states employing multiple inputs and …

System and method for combining MIMO and mode-division multiplexing

S Ashrafi, RD Linquist - US Patent 9,998,187, 2018 - Google Patents
A communications system includes first signal processing circuitry for receiving a plurality of
input data streams and applying a different orthogonal function to each of the plurality of …

Re-generation and re-transmission of millimeter waves for building penetration

S Ashrafi - US Patent 10,014,948, 2018 - Google Patents
A system for enabling signal penetration into a building includes first circuitry, located on an
outside of the building, that receives millimeter wave signals and converting the millimeter …