Accurate modelling of fabricated hollow-core photonic bandgap fibers
Accurate modelling of fabricated hollow-core photonic bandgap fibers
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DOI：
10.1364/oe.23.023117
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发表时间：
2015-09-07
期刊：
影响因子：
3.8
通讯作者：
Poletti, Francesco
中科院分区：
文献类型：
--
作者：
Fokoua, Eric Numkam;Sandoghchi, Seyed Reza;Poletti, Francesco
我们提出了一种新的方法，从扫描电子显微镜图像重建制造的空芯光子带隙光纤的横截面轮廓。有限元模拟的重建几何实现了显着的匹配与测量的传输窗口，表面模式的位置和衰减。从表面粗糙度估计的散射损耗和测量的损耗值之间的协议表明，结构变形，特别是玻璃的不均匀分布在芯边界上的薄二氧化硅支柱，有很大的影响的损失。这提供了对理想模型和制造光纤之间差异的深入了解，这可能是进一步降低光纤损耗的关键。(C)2015美国光学学会
We report a novel approach to reconstruct the cross-sectional profile of fabricated hollow-core photonic bandgap fibers from scanning electron microscope images. Finite element simulations on the reconstructed geometries achieve a remarkable match with the measured transmission window, surface mode position and attenuation. The agreement between estimated scattering loss from surface roughness and measured loss values indicates that structural distortions, in particular the uneven distribution of glass across the thin silica struts on the core boundary, have a strong impact on the loss. This provides insight into the differences between idealized models and fabricated fibers, which could be key to further fiber loss reduction. (C) 2015 Optical Society of America