常规光纤与环芯光纤中轨道角动量模式的稳定性
Stability of Orbital Angular Momentum Modes in Conventional and Ring-Core Optical Fibers
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中文总结 AI 辅助
本研究探究环芯光纤的模式耦合机制，发现其几何结构可抑制轨道角动量模式间耦合，解释了该类光纤中轨道角动量模式传输稳定性更优的原因，并为模式转换器设计提供几何约束。
中文摘要 AI 辅助
多模光纤中的模式动力学从根本上由相位匹配与模间耦合的相互作用决定。本研究探究了环芯光纤中的基本耦合机制，发现一种由几何结构诱导的耦合抑制效应，与常规多模阶跃折射率光纤相比，该效应可显著降低轨道角动量模式间的耦合系数。此机制为环芯光纤中轨道角动量模式更优异的传输稳定性提供了清晰的物理解释，并为基于环芯光纤的模式转换器设计确立了特定的几何约束条件。
英文摘要
Modal dynamics in multimode optical fibers are fundamentally governed by the inter- play between phase matching and intermodal coupling. In this work, we investigate the fundamental coupling mechanisms in ring-core fibers and identify a geometry-induced cou- pling suppression that significantly reduces coupling coefficients between orbital angular momentum modes compared to conventional multimode step-index fibers. This mechanism provides a clear physical explanation for the superior transmission stability of orbital angular momentum modes in ring-core fibers and establishes specific geometric constraints for the design of ring-core fiber-based mode converters.
