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

IF 2.3 4区 计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Iet Optoelectronics Pub Date : 2023-06-05 DOI:10.1049/ote2.12093
Zareen Mustafa, Mohammad Rakibul Islam, Md. Aminul Islam, Nafiz Imtiaz Bin Hamid
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Abstract

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 ± 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.

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用于太赫兹波导的Topas基八圆包层矩形多孔芯光子晶体光纤
本文提出了一种利用多孔芯光子晶体光纤(PC-PCF)引导太赫兹(THz)波的新设计。这种方法是由一个基于topas的带有矩形气槽的八角形核心证实的。利用有限元方法和完全匹配层边界条件,研究了包层区域由八角形气孔和圆形气孔组成的结构的导向特性。该结构的双折射率为0.05,有效材料损耗为0.013 cm−1。此外,它表现出平坦的色散,测量为0.6±0.16 p s / T H z / c m $0.6\pm 0.16\,\ mathm {p}\ mathm {s}/\ mathm {T}\ mathm {H}\ mathm {z}/\ mathm {c}\ mathm {m}$频率在0.4到1.6太赫兹之间。此外,该结构具有60%的高芯功率分数,在孔隙率为65%、芯直径为290 μm、频率为1.6 THz时,约束损耗为10 ~ 18 cm−1。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进行了数值分析和严格讨论,并与现有技术的光纤制造可行性进行了严格的讨论。
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来源期刊
Iet Optoelectronics
Iet Optoelectronics 工程技术-电信学
CiteScore
4.50
自引率
0.00%
发文量
26
审稿时长
6 months
期刊介绍: IET Optoelectronics publishes state of the art research papers in the field of optoelectronics and photonics. The topics that are covered by the journal include optical and optoelectronic materials, nanophotonics, metamaterials and photonic crystals, light sources (e.g. LEDs, lasers and devices for lighting), optical modulation and multiplexing, optical fibres, cables and connectors, optical amplifiers, photodetectors and optical receivers, photonic integrated circuits, photonic systems, optical signal processing and holography and displays. Most of the papers published describe original research from universities and industrial and government laboratories. However correspondence suggesting review papers and tutorials is welcomed, as are suggestions for special issues. IET Optoelectronics covers but is not limited to the following topics: Optical and optoelectronic materials Light sources, including LEDs, lasers and devices for lighting Optical modulation and multiplexing Optical fibres, cables and connectors Optical amplifiers Photodetectors and optical receivers Photonic integrated circuits Nanophotonics and photonic crystals Optical signal processing Holography Displays
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