Negative curvature fiber for suppressing high-order radial OAM modes transmission

Zhenghan Zhu; Dexian Yan; Xiangjun Li; Le Zhang; Jining Li

Results in Physics (Sep 2023)

Negative curvature fiber for suppressing high-order radial OAM modes transmission

Zhenghan Zhu,
Dexian Yan,
Xiangjun Li,
Le Zhang,
Jining Li

Affiliations

Zhenghan Zhu: Center for THz Research, China Jiliang University, Hangzhou 310018, China; Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of Information Engineering, China Jiliang University, Hangzhou 310018, China
Dexian Yan: Center for THz Research, China Jiliang University, Hangzhou 310018, China; Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of Information Engineering, China Jiliang University, Hangzhou 310018, China; Corresponding author at: Center for THz Research, China Jiliang University, Hangzhou 310018, China.
Xiangjun Li: Center for THz Research, China Jiliang University, Hangzhou 310018, China; Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of Information Engineering, China Jiliang University, Hangzhou 310018, China
Le Zhang: Center for THz Research, China Jiliang University, Hangzhou 310018, China; Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of Information Engineering, China Jiliang University, Hangzhou 310018, China
Jining Li: College of Precision Instrument and Optoelectronic Engineering, Tianjin University, Tianjin 300072, China

Journal volume & issue: Vol. 52
p. 106910

Abstract

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The combination of terahertz (THz) wave and the orbital angular momentum (OAM) multiplexing technology can further improve the communication capacity. Compared to other outer cladding structures, the negative curvature structure has been proven to provide stronger confinement effect on electromagnetic waves. Here, we propose a novel polymer (COC TOPAS) fiber which consists a central hollow-core, annular region and single layer negative curvature circle tubes as outer cladding for terahertz OAM modes transmission. The mode map is established by mathematical analysis of cut-off conditions for the vector modes, and the excitation of high-order radial modes in the fiber is successfully suppressed. In addition, the effective refractive index, confinement loss, effective mode area, mode purity and dispersion characteristics of the fiber are investigated under the condition of ‘single mode’ operation in the frequency range of 2.0–3.0 THz.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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