We report the use of a terahertz (THz) transparent material, cyclic olefin copolymer (COC or TOPAS), for fabricating a hollow-core antiresonant fiber that provides an electromagnetic wave guidance in the THz regime. A novel fabrication technique to realize a hollow-core antiresonant polymer optical fiber (HC-ARPF) for THz guidance is proposed and demonstrated. The fiber is directly extruded in a single-step procedure using a conventional fused deposition modeling 3D printer. The fiber geometry is defined by a structured nozzle manufactured with a metal 3D printer, which allows tailoring of the nozzle design to the various geometries of microstructured optical fibers. The possibility to use the HC-ARPF made from TOPAS for guiding in the THz region is theoretically and experimentally assessed through the profile of mode simulation and time-frequency diagram (spectrogram) analysis.

中文翻译：

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使用金属 3D 打印喷嘴从 3D 打印机挤出的基于空心反共振太赫兹纤维的 TOPAS

我们报告了使用太赫兹 (THz) 透明材料、环烯烃共聚物（COC 或 TOPAS）来制造空心反谐振光纤，该光纤在太赫兹范围内提供电磁波引导。提出并展示了一种实现用于太赫兹制导的空心反谐振聚合物光纤 (HC-ARPF) 的新型制造技术。使用传统的熔融沉积建模 3D 打印机，通过一步程序直接挤出纤维。纤维几何形状由用金属 3D 打印机制造的结构化喷嘴定义，允许根据微结构光纤的各种几何形状定制喷嘴设计。