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Fibers 2017, 5(4), 43; https://doi.org/10.3390/fib5040043

Strong Light Localization and a Peculiar Feature of Light Leakage in the Negative Curvature Hollow Core Fibers

Fiber Optics Research Center of RAS, Moscow 119333, Russia
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Academic Editors: Liang Dong and Hwayaw Tam
Received: 31 August 2017 / Revised: 12 October 2017 / Accepted: 9 November 2017 / Published: 14 November 2017
(This article belongs to the Special Issue Fabrication of Special Optical Glass and Polymer Fibres)
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Abstract

In this paper we would like to continue a discussion started in our previous work and devoted to the mechanism of light localization in hollow core microstructured fibers with a noncircular core-cladding boundary. It has been shown in many works that, for waveguide microstructures with different types of core-cladding boundary shape, the positions of the transmission bands’ edges can be predicted by applying the well-known anti–resonant reflecting optical waveguide (ARROW) model. At the same time, the ARROW model cannot explain the strong light localization and guiding at high material loss inside the transmission bands which are observed in negative curvature hollow core fibers, for example. In this paper we want to clarify our previous findings and consider the light localization process from another point of view, namely, by comparing the light leakage process in waveguide microstructures with different shapes of the core-cladding boundary. The results are discussed based on the ARROW model and a new approach associated with the consideration of spatial dispersion occurring under the interaction of the air core mode with the core-cladding boundary. View Full-Text
Keywords: hollow core microstructured fibers; light localization mechanisms; negative curvature hollow core fibers hollow core microstructured fibers; light localization mechanisms; negative curvature hollow core fibers
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Pryamikov, A.D.; Alagashev, G.K. Strong Light Localization and a Peculiar Feature of Light Leakage in the Negative Curvature Hollow Core Fibers. Fibers 2017, 5, 43.

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