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Silica Segmented Cladding Fiber Design and Its Fabrication Using a Powder-in-Tube Technique
Journal of Lightwave Technology ( IF 4.7 ) Pub Date : 2021-09-10 , DOI: 10.1109/jlt.2021.3111661
Marzieh Pournoury , Seung-Ryong Han , Marjan Ghasemi , Hyeonwoo Lee , Donghyun Kim , Kyunghwan Oh

A new design of segmented cladding fiber (SCF) was proposed and fabricated in silica glass. The silica glass SCF had a central core and hexagonal wings with higher refractive indices than silica cladding. The proposed SCF was analyzed numerically in terms of the confinement loss and the effective mode area using finite element method (FEM). In experiments, SCF preform was prepared by a stack-and-draw method using two types of pre-drawn rods: silica rods for the cladding and Al-doped silica rods for the higher refractive index segments and the central core. The latter was fabricated in the powder in tube (PIT) process by optimizing the heating cycles and the bubble removal during the sintering process. Light guidance along the SCF was experimentally confirmed and its intensity patterns in the near-field at the wavelengths 0.980 μm and 1.550 μm were characterized. With the proposed SCF, all silica SCF fabrication feasibility was confirmed, which can open a new alternative for large mode area fibers.

中文翻译:

二氧化硅分段包覆光纤设计及其使用管内粉末技术制造

提出了一种新的分段包层光纤 (SCF) 设计,并在石英玻璃中制造。石英玻璃 SCF 具有中心纤芯和六边形翼,其折射率高于石英包层。使用有限元方法 (FEM) 在限制损耗和有效模式面积方面对所提出的 SCF 进行了数值分析。在实验中,SCF 预制棒是通过堆叠拉制方法制备的,使用两种类型的预拉棒:用于包层的石英棒和用于较高折射率段和中心纤芯的掺铝石英棒。后者是通过优化加热循环和烧结过程中的气泡去除,在管内粉末 (PIT) 工艺中制造的。实验证实了沿 SCF 的光导及其近场中波长为 0.980 μm 和 1 的强度模式。550 μm 被表征。使用所提出的 SCF,确认了全二氧化硅 SCF 制造的可行性,这可以为大模式面积光纤开辟新的替代方案。
更新日期:2021-11-12
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