Special Issue on Novel Insights into Orbital Angular Momentum Beams: From Fundamentals, Devices to Applications

Yue, Yang; Huang, Hao; Ren, Yongxiong; Pan, Zhongqi; Willner, Alan E.

doi:10.3390/app9132600

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…It is also worth noting that these tools can only be used in laboratory conditions. These methods are described in detail for example in [ 4 , 5 ]. Thus, the task of generating OAM beams in free space optics is generally solved, but it is not clear how to apply free space solutions to already deployed fiber links or future fiber systems.…”

Section: Introductionmentioning

confidence: 99%

Generation of Vortex Optical Beams Based on Chiral Fiber-Optic Periodic Structures

Gizatulin

Meshkov

Vinogradova

et al. 2020

Sensors

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In this paper, we consider the process of fiber vortex modes generation using chiral periodic structures that include both chiral optical fibers and chiral (vortex) fiber Bragg gratings (ChFBGs). A generalized theoretical model of the ChFBG is developed including an arbitrary function of apodization and chirping, which provides a way to calculate gratings that generate vortex modes with a given state for the required frequency band and reflection coefficient. In addition, a matrix method for describing the ChFBG is proposed, based on the mathematical apparatus of the coupled modes theory and scattering matrices. Simulation modeling of the fiber structures considered is carried out. Chiral optical fibers maintaining optical vortex propagation are also described. It is also proposed to use chiral fiber-optic periodic structures as sensors of physical fields (temperature, strain, etc.), which can be applied to address multi-sensor monitoring systems due to a unique address parameter—the orbital angular momentum of optical radiation.

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Section: Introductionmentioning

confidence: 99%

Generation of Vortex Optical Beams Based on Chiral Fiber-Optic Periodic Structures

Gizatulin

Meshkov

Vinogradova

et al. 2020

Sensors

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“…1), irrespective of polarization. Studies on these optical vortices are flourishing, due to wide applicability including optical nanomanipulation, viscometry, free-space communications and information transfer, imaging, and microscopy; the reader is referred to a dedicated set of texts and articles on this large and ever-expanding field [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Enhanced optical activity using the orbital angular momentum of structured light

Forbes

Andrews

2019

Phys. Rev. Research

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Recent molecular photonics studies have highlighted the significant role that phase-structured light possessing orbital angular momentum (OAM) can have when interacting with matter. These studies discovered chiroptical effects sensitive to both the magnitude and sign of the optical OAM in both the absorption and scattering of twisted photons by molecules and nanoparticles. Specifically, it has been shown how a structured beam engaging with electric-quadrupole transitions in the material allows a unique sensitivity to the helical-phase structure of twisted light. In this paper we highlight experimental methodologies and systems suitable to observe and quantify the chiroptical processes of Rayleigh and Raman optical activity, and the newly discovered circular-vortex differential scattering effect with structured light-including the importance of off-axis beam alignment, input beam intensity structure, multipolar moments, and scattering-angle dependencies. It is shown that with a judicious choice of experimental setup, chiroptical effects that scale with the topological charge or OAM of the input beam enable optical activity signals to be enhanced and significantly exceed those based solely on circularly polarized, unstructured light. The new technique thus offers a highly useful and important spectroscopic application of structured light. The more detailed role that perfect optical vortices with high OAM will play in such optical activity effects is now highlighted, to show where there is substantial scope for experimental application, specifically in vibrational optical activity and chiral spectroscopy.

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Chiral fiber Bragg gratings for vortex signal generation

Gizatulin¹,

Meshkov²,

Vinogradova³

et al. 2021

Optical Technologies for Telecommunications 2020

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Special Issue on Novel Insights into Orbital Angular Momentum Beams: From Fundamentals, Devices to Applications

Abstract: It is well-known now that angular momentum carried by elementary particles can be categorized as spin angular momentum (SAM) and orbital angular momentum (OAM) [...]

Cited by 3 publications

References 33 publications

Generation of Vortex Optical Beams Based on Chiral Fiber-Optic Periodic Structures

Generation of Vortex Optical Beams Based on Chiral Fiber-Optic Periodic Structures

Enhanced optical activity using the orbital angular momentum of structured light

Chiral fiber Bragg gratings for vortex signal generation

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