高效锥形太赫兹耦合器

设计了将太赫兹波耦合进入波导的耦合器.耦合器由金属材料铝制成,形状为中空圆锥形和圆柱形的结合.在宽带的脉冲太赫兹信号和单频的连续太赫兹信号两种情况下,模拟并实验测试了耦合器将自由空间传输的平行太赫兹波耦合进入反谐振波导,结果显示该耦合器是宽带太赫兹波耦合器.通过优化耦合器几何参数,在太赫兹时域系统下得到振幅耦合率达到71%,振幅增强因子为6.125....

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Bibliographic Details
Published in红外与毫米波学报 Vol. 35; no. 2; pp. 194 - 199
Main Author 陈天霁 和挺 张波 沈京玲
Format Journal Article
LanguageChinese
Published 首都师范大学物理系太赫兹光电子学教育部重点实验室,北京,100048 2016
Subjects
太赫兹耦合器
波导
锥形孔
terahertz coupler
太赫兹耦合器
锥形孔
conical aperture
波导
waveguide
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ISSN1001-9014
DOI10.11972/j.issn.1001-9014.2016.02.013

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Summary:设计了将太赫兹波耦合进入波导的耦合器.耦合器由金属材料铝制成,形状为中空圆锥形和圆柱形的结合.在宽带的脉冲太赫兹信号和单频的连续太赫兹信号两种情况下,模拟并实验测试了耦合器将自由空间传输的平行太赫兹波耦合进入反谐振波导,结果显示该耦合器是宽带太赫兹波耦合器.通过优化耦合器几何参数,在太赫兹时域系统下得到振幅耦合率达到71%,振幅增强因子为6.125.
Bibliography:A coupler for coupling terahertz radiation into a waveguide was designed,which is the combination of a conical column and a short cylinder made of aluminum. The performance of the coupler in the cases of a broadband collimated terahertz wave and a single frequency collimated terahertz wave from free-space into an anti-resonate waveguide was simulated by theory and verified by experiment. The results confirm that the coupler is a high efficiency and broad band THz coupler. By optimizing the dimension parameters of the coupler,the amplitude coupling ratio of 71% and the amplitude concentration factor of 6. 125 in the terahertz time domain spectroscopy system have been achieved.
CHEN Tian-Ji, HE Ting, ZHANG Bo, SHEN Jing-Ling （Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing 100048, China）
31-1577/TN
terahertz coupler; conical aperture; waveguide
ISSN:1001-9014
DOI:10.11972/j.issn.1001-9014.2016.02.013