摘要
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.
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.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2016年第2期194-199,共6页
Journal of Infrared and Millimeter Waves
基金
Supported by National Instrumentation Program(2012YQ140005)
Nature Science Foundation of Beijing(4144069)
Science and Technology Project of Beijing Municipal Education Commission(KM201410028004)
关键词
太赫兹耦合器
锥形孔
波导
terahertz coupler
conical aperture
waveguide
