Topas-based octa-circular cladding and rectangular porous core photonic crystal fibre for terahertz waveguide,IET Optoelectronics

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Topas-based octa-circular cladding and rectangular porous core photonic crystal fibre for terahertz waveguide
IET Optoelectronics ( IF 2.3 ) Pub Date : 2023-06-05 , DOI: 10.1049/ote2.12093
Zareen Mustafa ₁ , Mohammad Rakibul Islam ₁ , Md. Aminul Islam ₂ , Nafiz Imtiaz Bin Hamid ₁

Affiliation

This article presents a novel design for guiding terahertz (THz) waves, which utilises a photonic crystal fibre with a porous core (PC-PCF). This approach is substantiated by a Topas-based octagonal-shaped core with rectangular air slots. By utilising Finite Element Method and Perfectly Matched Layer boundary condition, the guiding properties of a structure consisting of octagonal air holes integrated with circular air slots in the cladding region have been investigated. The proposed structure exhibits a birefringence value of 0.05 and a low effective material loss of 0.013 cm⁻¹. Moreover, it exhibits flattened dispersion measuring

0.6 \pm 0.16 p s / T H z / c m $0.6\pm 0.16\,\mathrm{p}\mathrm{s}/\mathrm{T}\mathrm{H}\mathrm{z}/\mathrm{c}\mathrm{m}$

at a wide-ranging frequency of 0.4 to 1.6 THz. In addition to that, the proposed structure offers 60% high core power fraction, 10⁻¹⁸ cm⁻¹ confinement loss at 65% porosity of 290 μm core diameter and 1.6 THz frequency. Other significant waveguide properties: effective refractive index, effective area, spot size, and beam divergence of the proposed fibre are numerically analysed and discussed rigorously along with the fabrication viability of the fibre with existing techniques.

中文翻译：

太赫兹波导用Topas基八圆包层矩形多孔芯光子晶体光纤

本文提出了一种用于引导太赫兹（THz）波的新颖设计，该设计利用具有多孔芯的光子晶体光纤（PC-PCF）。这种方法由带有矩形空气槽的基于 Topas 的八角形磁芯证实。利用有限元方法和完美匹配层边界条件，研究了包层区域八角形气孔与圆形气槽集成结构的导向性能。所提出的结构表现出0.05的双折射值和0.013cm ^-1的低有效材料损失。此外，它还表现出平坦的色散测量

0.6 \pm 0.16 p s / 时间 H z / C 米 $0.6\pm 0.16\,\mathrm{p}\mathrm{s}/\mathrm{T}\mathrm{H}\mathrm{z}/\mathrm{c}\mathrm{m}$

频率范围广，为 0.4 至 1.6 THz。除此之外，所提出的结构在290μm核心直径和1.6THz频率的65％孔隙率下提供60％高核心功率分数、10 ^-18 cm ^{-1限制损耗。}其他重要的波导特性：有效折射率、有效面积、光斑尺寸和所提出的光纤的光束发散度以及使用现有技术制造光纤的可行性进行了严格的数值分析和讨论。

更新日期：2023-06-05

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