Optical Design and Engineering

Terahertz low-loss hollow-core pipe waveguides

[+] Author Affiliations
Min Wang, Ye Yang, Yan Zheng, Wei Fan, Wei Hu, Chengyan Jia, Jiandong Chen, Jin Zhang

Jilin University, College of Instrumentation Science and Electrical Engineering, No. 938, West Democratic Street, Chaoyang District, Changchun, Jilin 130012, China

Liyun Xing

Jilin University, College of Instrumentation Science and Electrical Engineering, No. 938, West Democratic Street, Chaoyang District, Changchun, Jilin 130012, China

Beihua University, Jilin, Jilin 130000, China

Tianying Chang, Hong-Liang Cui

Jilin University, College of Instrumentation Science and Electrical Engineering, No. 938, West Democratic Street, Chaoyang District, Changchun, Jilin 130012, China

Shandong Academy of Sciences, Jinan, Shandong 250014, China

Opt. Eng. 54(8), 085106 (Aug 21, 2015). doi:10.1117/1.OE.54.8.085106
History: Received June 12, 2015; Accepted July 21, 2015
Text Size: A A A

Abstract.  A low-loss terahertz (THz) hollow-core pipe waveguide constructed of plastic material is demonstrated. The structure is designed to be especially effective in transmitting THz waves of 110 GHz, which has important applications in communications, imaging, and sensing. Guiding of the electromagnetic wave is based on the principle of antiresonant reflection. Through careful theoretical analyses and systematic modeling and simulation, followed by a thorough experimental investigation, we show that the proposed structure can successfully transmit THz waves with low attenuation. Furthermore, when the structures of the pipe waveguides are varied for optimization, we find that cladding thickness and the refractive index under antiresonant conditions as well as the core diameter are important physical parameters in designing the low-loss THz waveguide. Considering not just attenuation loss but such factors as volume, weight, and flexibility of the tube waveguide, along with other practical issues such as cost, we arrive at an optimal design of the pipe waveguide, which has an inner diameter of 35 mm and cladding thickness of 5 mm. Teflon is chosen as the material for a guiding 110-GHz THz wave. The attenuation constant is determined by the simulation to be as low as 0.0228m1. However, due to nonuniformity of the waveguide wall thickness and random small bending of the waveguide, as well as moisture content in the air filling the pipe core, all of which strongly impede propagation in the waveguide, the experimentally measured attenuation loss (3.65m1) of the waveguide is much more significant than the theoretical prediction, with the latter serving as a design benchmark under perfect conditions.

Figures in this Article
© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Min Wang ; Ye Yang ; Liyun Xing ; Yan Zheng ; Wei Fan, et al.
"Terahertz low-loss hollow-core pipe waveguides", Opt. Eng. 54(8), 085106 (Aug 21, 2015). ; http://dx.doi.org/10.1117/1.OE.54.8.085106


Tables

Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.