A Dual-Frequency Quasi-Optical Output System for a THz Gyro-Multiplier

A Dual-Frequency Quasi-Optical Output System for a THz Gyro-Multiplier
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太赫兹陀螺倍增器的双频准光输出系统

DOI:
10.1109/tthz.2016.2581982
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发表时间:
2016-09
影响因子:
3.2
通讯作者:
Chen Xiaodong
Chen Xiaodong
中科院分区:
工程技术2区
文献类型:
--
作者:
Li Xiang;Liu Xiaoming;Alfadhl Yasir;Ronald Kevin;He Wenlong;Cross Adrian;Chen Xiaodong

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本文通过几何光学分析和三维全波模拟,研究了太赫兹波段四次谐波陀螺倍增器的准光输出系统。陀螺倍增器的输出系统不仅需要将两个高阶波导模转换成准高斯光束,而且还需要将两个光束分离。该系统采用双频准光模式转换器(DQMC)和频率选择表面(FSS)来实现这两个目标。我们的研究表明,DQMC的优化设计需要在陀螺乘法器中进行特殊的模式选择。设计、制作了高通FSS,并利用THz-TDS系统进行了实验验证。我们还证明了所设计的FSS能够处理来自陀螺乘法器的高功率输出。
This paper presents the investigation of a quasi-optical output system for a fourth-harmonic gyro-multiplier in the THz band through geometric optic analysis and three-dimensional full-wave simulation. The output system of the gyro-multiplier needs not only to transfer two high-order waveguide modes into the quasi-Gaussian beams, but also to separate the two beams. A dual-frequency quasi-optical mode converter (DQMC) and a frequency selective surface (FSS) are employed to achieve both goals within this system. Our study has shown that the optimal design of the DQMC requires a special mode selection in the gyro-multiplier. The high-pass FSS is designed, fabricated, and experimentally verified by a THz-TDS system. We have also demonstrated that the designed FSS is capable of handling the high-power output from the gyro-multiplier.
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