Li Lin, Lin Dongfeng, Meng Fanchao, Zhao Yiming, Cui Yiping, Cao Yin, Liu Hongwei, Mu Hongqian, Niu Yingli, He Jingwen, Liang Sheng
Appl Opt. 2023 Jul 20;62(21):5778-5785. doi: 10.1364/AO.489623.
In this work, a hollow-core anti-resonant terahertz (THz) fiber with elliptical cladding and nested tubes is proposed and fabricated. It is an effective way to reduce the loss of THz waves by transmitting them in an air core and breaking the material absorption. After parameter optimization of the initial structure, multiple transmission windows exist in the 0.2-0.8 THz band, where confinement loss is as low as 3.47×10 at 0.8 THz. At 0.2-0.7 THz, confinement losses lie between 10 and 10. The 3D printed samples are characterized by a THz time-domain spectroscopy system. Experimental results showed that the designed fiber structure transmits loss coefficients up to 10 in the 0.2-0.8 THz band (the minimum value is located at 0.46 THz, corresponding to a loss coefficient of 0.0284). The experiments show that the designed THz fiber achieves a good transmission effect.
在这项工作中，提出并制造了一种具有椭圆形包层和嵌套管的空心反谐振太赫兹（THz）光纤。通过在空气芯中传输太赫兹波并打破材料吸收来降低太赫兹波损耗是一种有效方法。对初始结构进行参数优化后，在0.2 - 0.8太赫兹频段存在多个传输窗口，其中在0.8太赫兹时的限制损耗低至3.47×10 。在0.2 - 0.7太赫兹时，限制损耗在10 至10 之间。3D打印样品由太赫兹时域光谱系统进行表征。实验结果表明，所设计的光纤结构在0.2 - 0.8太赫兹频段的传输损耗系数高达10 （最小值位于0.46太赫兹处，对应损耗系数为0.0284）。实验表明，所设计的太赫兹光纤实现了良好的传输效果。
