In this paper, the confinement loss diagram (CLD) is combined with the modal filtering approach to design low loss single-mode terahertz (THz) Bragg fibers. To filter out the TM01 mode, the confinement loss diagram is exploited to locate a cutoff point which allows the use of a larger air core. Consequently, a lower loss can be obtained while only the HE11 can propagate effectively. The designed Bragg fiber can achieve simulated propagation loss around 0.2 dB/m to 0.5 dB/m in the range of 0.7 THz to 1.4 THz, with only 10 layers of Bragg cladding.
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机译：本文将局限损耗图（CLD）与模态滤波方法结合起来，设计低损耗单模太赫兹（THz）布拉格光纤。为了滤出TM 01 模式，利用了限制损耗图来确定一个允许使用更大空芯的截止点。因此，只有HE 11 可以有效传播，而损耗却较低。设计的布拉格光纤可以在0.7 THz至1.4 THz的范围内实现约0.2 dB / m至0.5 dB / m的模拟传输损耗，仅需10层布拉格包层。
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