Optimum Design of Glass-Air Disordered Optical Fiber with Two Different Element Sizes

This paper presents a detailed study investigating the effect of the material refractive index distribution at the local position of a glass-air disordered optical fiber (G-DOF) on its localized beam radius. It was found that the larger the proportion of the glass material, the smaller its localized beam radius, which means that the transverse Anderson localization (TAL) effect would be stronger. Accordingly, we propose a novel G-DOF with large-size glass elements doped in the fiber cross-section. The simulation results show that the doped large-size glass elements can reduce the localized beam radius in the doped region and has a very tiny effect on the undoped region, thus contributing to reducing the average localized beam radius of G-DOF.

Automated summary

This paper presents a detailed study on the effect of the material refractive index distribution of a G-DOF on its localized beam radius. The study found that a larger proportion of glass material leads to a smaller localized beam radius, implying a stronger transverse Anderson localization effect. To address this, a novel G-DOF with large-size glass elements doped in the fiber cross-section is proposed. Simulation results demonstrate that the doped large-size glass elements can reduce the localized beam radius in the doped region without significant impact on the undoped region, thereby contributing to a reduction in the average localized beam radius of G-DOF.