Design and optimization of terahertz directional coupler based on hybrid-cladding hollow waveguide with low confinement loss

doi:10.1088/1674-1056/24/6/068702

中国物理B ›› 2015, Vol. 24 ›› Issue (6): 68702-068702.doi: 10.1088/1674-1056/24/6/068702

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Design and optimization of terahertz directional coupler based on hybrid-cladding hollow waveguide with low confinement loss

于莹莹, 李绪友, 孙波, 何昆鹏

College of Automation, Harbin Engineering University, Harbin 150001, China

收稿日期:2014-10-15 修回日期:2014-12-30 出版日期:2015-06-05 发布日期:2015-06-05
基金资助:
Project supported by the Specific Scientific and Technological Cooperation between China and Russia (Grant No. 2010DFR80140) and the National Natural Science Foundation of China (Grant No. 51309059).

Design and optimization of terahertz directional coupler based on hybrid-cladding hollow waveguide with low confinement loss

Yu Ying-Ying (于莹莹), Li Xu-You (李绪友), Sun Bo (孙波), He Kun-Peng (何昆鹏)

College of Automation, Harbin Engineering University, Harbin 150001, China

Received:2014-10-15 Revised:2014-12-30 Online:2015-06-05 Published:2015-06-05
Contact: Yu Ying-Ying E-mail:yuyingying58@hotmail.com
About author:87.50.U-; 42.81.Qb; 42.81.Dp
Supported by:
Project supported by the Specific Scientific and Technological Cooperation between China and Russia (Grant No. 2010DFR80140) and the National Natural Science Foundation of China (Grant No. 51309059).

摘要/Abstract

摘要： We propose a design and optimization for directional coupling in terahertz hybrid-cladding hollow waveguide. It is composed of two square hollow waveguides which touch each other and are surrounded by a metallic layer. By employing the finite element method, the coupling performance and loss property are numerically investigated. Numerical results indicate that this directional coupler with hybrid-cladding can realize ultra-narrow-band coupling; it provides a low confinement loss performance: the confinement loss can reach as low as 6.27× 10^-5 cm^-1. Moreover, the further analyses of configuration and performance show that confinement loss and frequency range shift for the low-confinement-loss frequency regime can be realized and optimized by appropriately tuning the thickness values of the metallic and dielectric layer. In addition, through the further analysis of coupling performance, the possibilities of realizing ultra-narrow-band couplings in different frequency ranges are demonstrated. It is a powerful candidate for high precision optical fiber sensing, and communication in terahertz splitting fields.

关键词: terahertz, terahertz waveguides, coupler, hollow waveguide, ultra-narrow-band coupling

Abstract: We propose a design and optimization for directional coupling in terahertz hybrid-cladding hollow waveguide. It is composed of two square hollow waveguides which touch each other and are surrounded by a metallic layer. By employing the finite element method, the coupling performance and loss property are numerically investigated. Numerical results indicate that this directional coupler with hybrid-cladding can realize ultra-narrow-band coupling; it provides a low confinement loss performance: the confinement loss can reach as low as 6.27× 10^-5 cm^-1. Moreover, the further analyses of configuration and performance show that confinement loss and frequency range shift for the low-confinement-loss frequency regime can be realized and optimized by appropriately tuning the thickness values of the metallic and dielectric layer. In addition, through the further analysis of coupling performance, the possibilities of realizing ultra-narrow-band couplings in different frequency ranges are demonstrated. It is a powerful candidate for high precision optical fiber sensing, and communication in terahertz splitting fields.

Key words: terahertz, terahertz waveguides, coupler, hollow waveguide, ultra-narrow-band coupling

中图分类号:

87.50.U-

42.81.Qb (Fiber waveguides, couplers, and arrays) 42.81.Dp (Propagation, scattering, and losses; solitons)

于莹莹, 李绪友, 孙波, 何昆鹏. Design and optimization of terahertz directional coupler based on hybrid-cladding hollow waveguide with low confinement loss[J]. 中国物理B, 2015, 24(6): 68702-068702.

Yu Ying-Ying (于莹莹), Li Xu-You (李绪友), Sun Bo (孙波), He Kun-Peng (何昆鹏). Design and optimization of terahertz directional coupler based on hybrid-cladding hollow waveguide with low confinement loss[J]. Chin. Phys. B, 2015, 24(6): 68702-068702.

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Design and optimization of terahertz directional coupler based on hybrid-cladding hollow waveguide with low confinement loss

Design and optimization of terahertz directional coupler based on hybrid-cladding hollow waveguide with low confinement loss

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