Lu Jen-Tang, Lai Chih-Hsien, Tseng Tzu-Fang, Chen Hua, Tsai Yuan-Fu, Chen I-Ju, Hwang Yuh-Jing, Chang Hung-chun, Sun Chi-Kuang
Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, 10617, Taiwan.
Opt Express. 2011 Oct 24;19(22):21532-9. doi: 10.1364/OE.19.021532.
We propose square and rectangular pipe waveguides for low-loss THz waveguiding and polarization control. Different from common circular-symmetric THz fibers and waveguides, the proposed rectangular pipe waveguides successfully remove the transmission degeneracy of two orthogonal polarizations and possess polarization sensitivity to the guided THz waves. By measuring the attenuation spectra, we find that the polarization sensitivity depends on the structure of the pipe waveguides. With butt coupling method, it is easy to combine circular pipe waveguides and the rectangular ones.
我们提出了用于低损耗太赫兹波导和偏振控制的方形和矩形管道波导。与常见的圆对称太赫兹光纤和波导不同，所提出的矩形管道波导成功消除了两个正交偏振的传输简并性，并且对所引导的太赫兹波具有偏振敏感性。通过测量衰减光谱，我们发现偏振敏感性取决于管道波导的结构。采用对接耦合方法，可以很容易地将圆形管道波导和矩形管道波导组合起来。
