Light transport and vortex-supported wave-guiding in micro-structured optical fibres

Pryamikov, Andrey D.; Alagashev, G. K.; Falkovich, Gregory; Turitsyn, Sergei K.

doi:10.1038/s41598-020-59508-z

Cited by 36 publications

(19 citation statements)

References 47 publications

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“…Additionally, the vortex-like dynamics of the radial component of the Poynting vector contour lines inside the fibre structure are remarkable. This interesting behaviour, also observed in other works 25 , 26 , calls for further exploration of the transverse energy flow in HCPCFs.…”

Section: Resultssupporting

confidence: 80%

Low-loss single-mode hybrid-lattice hollow-core photonic-crystal fibre

et al. 2021

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Remarkable recent demonstrations of ultra-low-loss inhibited-coupling (IC) hollow-core photonic-crystal fibres (HCPCFs) established them as serious candidates for next-generation long-haul fibre optics systems. A hindrance to this prospect and also to short-haul applications such as micromachining, where stable and high-quality beam delivery is needed, is the difficulty in designing and fabricating an IC-guiding fibre that combines ultra-low loss, truly robust single-modeness, and polarisation-maintaining operation. The design solutions proposed to date require a trade-off between low loss and truly single-modeness. Here, we propose a novel IC-HCPCF for achieving low-loss and effective single-mode operation. The fibre is endowed with a hybrid cladding composed of a Kagome-tubular lattice (HKT). This new concept of a microstructured cladding allows us to significantly reduce the confinement loss and, at the same time, preserve truly robust single-mode operation. Experimental results show an HKT-IC-HCPCF with a minimum loss of 1.6 dB/km at 1050 nm and a higher-order mode extinction ratio as high as 47.0 dB for a 10 m long fibre. The robustness of the fibre single-modeness is tested by moving the fibre and varying the coupling conditions. The design proposed herein opens a new route for the development of HCPCFs that combine robust ultra-low-loss transmission and single-mode beam delivery and provides new insight into IC guidance.

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Section: Resultssupporting

confidence: 80%

Low-loss single-mode hybrid-lattice hollow-core photonic-crystal fibre

et al. 2021

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“…Both phase distributions (Figure 3) are governed by a nonlinear rule [16] and these vortices are called anisotropic. In our work [17], we showed that the coordinates of the vortex centers of the transverse component of the Poynting vector of the leaky core modes also satisfy the equation P x (x, y) = P y (x, y) = 0, where P x and P y are projections of the transverse component of the Poynting vector.…”

Section: Role Of Losses In Vortex Formation In Hollow Core Waveguidesmentioning

confidence: 84%

“…Both phase distributions (Figure 3) are governed by a nonlinear rule [16] and these vortices are called anisotropic. In our work [17], we showed that the coordinates of the vortex centers…”

mentioning

confidence: 84%

Phase Dislocations in Hollow Core Waveguides

Pryamikov

2021

Fibers

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This paper discusses the basic concepts of phase dislocations and vortex formation in the electric fields of fundamental air core mode of hollow core waveguides with specific types of rotational symmetry of the core‐cladding boundary. Analysis of the behavior of the electric field phase in the transmission bands shows that the mechanism of light localization in the hollow core waveguides with discrete rotational symmetry of the core-cladding boundary cannot be completely described by the ARROW model. For an accurate description of the phase behavior, it is necessary to account for phase jumps of the magnitude of π when passing through the phase dislocations.

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“…A significant step forward in reducing the confinement loss was obtained with the introduction of the hypocycloid core contour (also known as negative curvature) by Benabid and co-workers [16], since it has effect both on spatial overlap and on frequency mismatch [6,17]. Other approaches based on light vortex have been proposed to explain the beneficial effects of the hypocycloidal core shap [18]. As of today, many hypocycloidal HC-ICF designs have been proposed and experimentally demonstrated, having loss not only lower than HC-PBGFs but also lower than solid-core silica fibers, both at short wavelengths [19,20], where losses are bound by Rayleigh scattering, and at long wavelengths [3,21,22], where they are bound by material absorption.…”

Section: Introductionmentioning

confidence: 99%

Analytical Formulas for Dispersion and Effective Area in Hollow-Core Tube Lattice Fibers

Rosa

Melli

Vincetti

2021

Fibers

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In this work, we propose analytical formulas for the estimation of dispersion properties and effective area of the fundamental mode of hollow-core inhibited coupling fibers with a microstructured cladding composed by a ring of dielectric tubes. The formulas are based on a model which has already been successfully applied to the estimation of confinement loss. The model takes into account the effects of the coupling of the fundamental core mode with the cladding modes in the context of the single-tube approximation. Effective index, group velocity dispersion, and effective area of the fundamental mode are estimated and compared with the results obtained from numerical simulations, by considering ten different fibers. The comparison shows a good accuracy of the proposed formulas, which do not require any tuning of fitting parameters. On the basis of the analysis carried out, a scaling law relating the effective area to the core radius is also given. Finally, the formulas give a good estimation of the same parameters of other Hollow-core inhibited coupling fibers, such as nested, ice-cream, and kagome fibers.

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Light transport and vortex-supported wave-guiding in micro-structured optical fibres

Cited by 36 publications

References 47 publications

Low-loss single-mode hybrid-lattice hollow-core photonic-crystal fibre

Low-loss single-mode hybrid-lattice hollow-core photonic-crystal fibre

Phase Dislocations in Hollow Core Waveguides

Analytical Formulas for Dispersion and Effective Area in Hollow-Core Tube Lattice Fibers

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