High-order operating mode selection using second-order bandgap in THz Bragg fiber
High-order operating mode selection using second-order bandgap in THz Bragg fiber
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DOI：
10.1109/ucmmt.2017.8068496
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发表时间：
2017-09
期刊：
影响因子：
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通讯作者：
B. Hong;N. Somjit;J. Cunningham;I. Robertson
中科院分区：
文献类型：
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作者：
B. Hong;N. Somjit;J. Cunningham;I. Robertson
本文展示了一种新的单te01模式布拉格光纤设计技术，利用二阶带隙在0.85 THz至1.15 THz范围内实现信号传播损耗小于1.2 dB/m。TE01模式本质上在靠近芯和包层之间的界面区域的电场中有一个零点。这使得TE01模式优于其他模式，因为它显示出低信号传播损耗和低包层缺陷的电磁干扰。由于模态过滤效应，布拉格光纤<e:1>可以表现出很强的模式选择性。通过适当调整光子带隙，可以设计出期望的TE01模式和竞争模式之间的大损耗区分。
This paper demonstrates a novel design technique for single-TE01-mode Bragg fiber using a second-order bandgap achieving signal propagation loss less than 1.2 dB/m from 0.85 THz to 1.15 THz. The TE01 mode intrinsically has a null point in the electric field close to the interface region between the core and the cladding. This makes the TE01 mode preferable to other modes since it shows low signal propagation loss and low electromagnetic interference from cladding defects. Bragg iîber can exhibit a strong mode selectivity as a result of modal-iîltering effects. A large loss discrimination between the desired TE01 mode and competing modes can be designed by appropriately tailoring the photonic bandgap.