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arXiv 1904.05085physics.optics
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微结构光纤中的光传输和涡旋支撑波导

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

Andrey Pryamikov, Grigory Alagashev, Gregory Falkovich, Sergei Turitsyn

摘要:

在流体动力学中,从光滑的层流到湍流的过渡过程中产生的涡流通常伴随着耗散的增加。然而,平面涡可以提供传输障碍,减少损失,因为它发生在许多地球物理,天体物理流动和托卡马克。光子与物质的相互作用会以意想不到的、有点违反直觉的方式影响光在波导中的传输,类似于流体动力学。在这里,我们展示了显着的影响,光涡旋形成的微结构光纤上的能量耗散。在包层中的零振幅线上,我们证明了在实芯和空芯光纤中形成涡旋的可能性。我们发现,涡旋减少了三个数量级的光泄漏,有效地提高了波导。基于相同原理的强光定位也可以在负曲率空芯光纤中实现。

英文摘要:

In hydrodynamics, vortex generation upon the transition from smooth laminar flows to turbulence is generally accompanied by increased dissipation. However, plane vortices can provide transport barriers and decrease losses, as it happens in numerous geophysical, astrophysical flows and in tokamaks. Photon interactions with matter can affectlight transportin waveguides in unexpected and somewhat counterintuitive ways resembling fluid dynamics. Here, we demonstrate dramatic impact of light vortex formation in micro-structured optical fibres on the energy dissipation. We show possibility of vortices formationin both solid core and hollow core fibres on the zero amplitude lines in the cladding. We find that vortices reduce light leakage by three orders of magnitude, effectively improving wave guiding. A strong light localization based on the same principle can also be achieved in the negative curvature hollow core fibres.

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