In this study, photonic crystal fiber in quasi pattern (Q-PCF) has been proposed at the terahertz (THz) regime. In Q-PCF, the core area is designed using the two elliptical air holes for the best performance of optical communications to obtain the ultra-low effective material loss (EML). In Q-PCF, perfectly matched layer (PML) and the finite element method (FEM) have been applied to simulate the desired outcomes. The mentioned Q-PCF is optimized by shifting the core diameter, cladding air holes pitch and diameter, porosity of the model, and background materials. The numerically controlled outcomes ensure an EML of 0.01542 cm⁻¹ with high power fraction response at 1 THz frequency. In addition, other loss profiles and operating modes have also been well described. Moreover, operating mode profile indicates single mode propagation up to 2.2 THz operating frequency. The noted outcomes ensure that the designed structure will be perfectly suitable for long distance broadband optical communication applications in THz technology.

在这项研究中，已提出了在太赫兹（THz）机制下的准模式光子晶体光纤（Q-PCF）。在Q-PCF中，使用两个椭圆形气孔设计核心区域，以实现最佳的光通信性能，从而获得超低的有效材料损耗（EML）。在Q-PCF中，已应用完美匹配层（PML）和有限元方法（FEM）来模拟所需的结果。通过改变纤芯直径，包层气孔节距和直径，模型的孔隙率和背景材料，可以优化提到的Q-PCF。数控结果确保EML为0.01542 cm ^-1在1 THz频率下具有高功率分数响应。另外，还已经很好地描述了其他损耗曲线和操作模式。此外，工作模式配置文件指示单模传播高达2.2 THz的工作频率。值得注意的结果确保了设计的结构将完全适合THz技术中的长距离宽带光通信应用。