介质金属膜波导在G波段和4.3THz的传输特性
投稿时间:2018-07-27  修订日期:2018-10-10  点此下载全文
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作者单位E-mail
张学文 复旦大学信息科学与工程学院 17210720180@fudan.edu.cn 
谭智勇 中国科学院上海微系统与信息技术研究所  
陈可旺 复旦大学信息科学与工程学院  
李维轩 复旦大学信息科学与工程学院  
赵泽巧 复旦大学信息科学与工程学院  
俞舒元 复旦大学信息科学与工程学院  
朱晓松 复旦大学信息科学与工程学院  
曹俊诚 中国科学院上海微系统与信息技术研究所  
石艺尉 复旦大学信息科学与工程学院 ywshi@fudan.edu.cn 
基金项目:军委科技委国防科技创新特区项目资助
中文摘要:制作了具有不同介质膜厚度的大口径柔性介质金属膜波导,测试了金属膜波导和介质金属膜波导在G波段、4.3 THz和中远红外等频段的传输特性。结果表明,波导的传输损耗在G波段随介质膜厚的增加而增加,孔径2.6mm的金属膜波导在160 GHz传输损耗为2.1 dB/m且在G波段波导的传输损耗对弯曲不敏感。在4.3 THZ频点波导的传输损耗随介质膜厚的增加而减小,镀制介质膜可以大幅减小波导的传输损耗以及弯曲附加损耗,孔径3.6 mm介质膜厚为1.2 μm的介质金属膜波导的传输损耗为2.84 dB/m。光斑能量则随介质膜厚的增加更加集中于低阶传输模式。
中文关键词:光纤光学  介质金属膜波导  G波段  太赫兹  传输损耗
 
Transmission characteristics of dielectric-coated metallic waveguides in G band and 4.3THz
Abstract:Big-bore and flexible dielectric-coated metallic waveguides were fabricated with various dielectric film thicknesses. Transmission characteristics were measured for the metallic waveguides and dielectric-coated metallic waveguides in G band, 4.3THz, and mid-infrared regions. Measured results show that waveguide loss in G band increases with the increase of dielectric film thickness. Loss for the 2.6mm-bore metallic waveguide was 2.1dB/m at the frequency of 160GHz and the additional loss caused by bending for the waveguide is small. Waveguide loss at 4.3THz decreases with the increase of dielectric film thickness. And the additional loss caused by bending for the dielectric-coated metallic waveguide decreases with the increase of dielectric film thickness. Loss for the 3.6mm-bore dielectric-coated metallic waveguide with 1.2mm dielectric film thickness is 2.84dB/m. Measured beam profiles show that energy is more concentrated in the low-order transmission mode as the film thickness increases.
keywords:fiber optics  dielectric-coated metallic waveguide  G band  terahertz  transmission loss
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