In this research work, we report a new design model of quasi-shaped cladding areas with rotated-hexa-based elliptical shaped core areas in photonic crystal fiber (Q-PCF) for terahertz waves of communication signals. Here, we present a six-layer circular air hole in the quasi-shape of cladding regions with two layers of rotated-hexa-based elliptical shaped air holes in the core regions of the Q-PCF for analysis of communication networks in the terahertz regime. Additionally, perfectly matched layers and the finite element method based on the COMSOL software are used to design this Q-PCF. For short- and wideband communication sectors, our proposed Q-PCF is highly useful, as it reduces ultralow effective material loss (EML), confinement loss, and scattering loss in the terahertz regime. After analysis of the numerical results, our suggested Q-PCF shows an ultralow EML of 0.0159 cm⁻¹, power fraction in the core area of 74%, large effective area of 5.49 × 10^–8 m², confinement loss of 3.22 × 10^–12 cm⁻¹, and scattering loss of 1.23 × 10^–10 at 1 THz frequency. Moreover, our proposed Q-PCF demonstrates single-mode propagation by the graphical results of the V-parameter over a frequency range of 0.80–3 THz. Our results suggest, we can clearly say that the reported Q-PCF may be highly appropriate for terahertz wave propagation for many communication networks.

在这项研究工作中，我们报告了一种新的设计模型，该模型在光子晶体光纤（Q-PCF）中具有基于旋转六基椭圆形核心区域的准六边形包层区域，用于通信信号的太赫兹波。在这里，我们提出了一个准层包层区域中的六层圆形气孔，在Q-PCF的核心区域中有两层旋转六基椭圆形气孔，用于分析太赫兹状态下的通信网络。此外，使用完美匹配的层和基于COMSOL软件的有限元方法来设计此Q-PCF。对于短波和宽带通信领域，我们提出的Q-PCF非常有用，因为它可以降低太赫兹范围内的超低有效材料损耗（EML），限制损耗和散射损耗。对数值结果进行分析后，^-1，核心区域的功率分数为74％，有效面积大为5.49×10 ^–8 m ²，限制损耗为3.22×10 ^–12  cm ^-1，并且在1 THz频率下的散射损耗为1.23×10 ^–10。此外，我们提出的Q-PCF通过V参数在0.80–3 THz频率范围内的图形结果演示了单模传播。我们的结果表明，我们可以清楚地说，报告的Q-PCF可能非常适合许多通信网络中的太赫兹波传播。