Effect of a spacer on localization of topological states in a Bragg multihelicoidal fiber with a twist defect

Effect of a spacer on localization of topological states in a Bragg multihelicoidal fiber with a twist defect

We have studied the influence of a spacer introduced into a Bragg multihelicoidal fiber with a twist defect on the existence of defect-localized states. We have shown that in the presence of a Gaussian pump the energy of the electromagnetic field stored in topologically charged defect-localized mode...

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Veröffentlicht in:Journal of optics (2010) 2018-02, Vol.20 (2), p.25603
Hauptverfasser: Alexeyev, C N, Lapin, B P, Yavorsky, M A
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Sprache:eng
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Bragg fiber
localized state
multihelicoidal fiber
optical vortex
spacer
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Lapin, B P
Yavorsky, M A
description We have studied the influence of a spacer introduced into a Bragg multihelicoidal fiber with a twist defect on the existence of defect-localized states. We have shown that in the presence of a Gaussian pump the energy of the electromagnetic field stored in topologically charged defect-localized modes essentially depends on the length of the spacer. We have demonstrated that by changing this length on the wavelength scale it is possible to strongly modulate such energy. This property can be used for generation and controlled emission of topologically charged light. We have also shown that if the value of an isotropic spacer's refractive index deviates from the optimal value defined by the parameters of the multihelicoidal fiber parts the effect of localization disappears.
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subjects Bragg fiber
localized state
multihelicoidal fiber
optical vortex
spacer
title Effect of a spacer on localization of topological states in a Bragg multihelicoidal fiber with a twist defect
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