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Proceedings Paper

Nested anti-resonant hollow core fiber for terahertz propagation
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Paper Abstract

A novel nested anti-resonant hollow core fiber (NAHF), based on Topas, with low loss and flattened dispersion is proposed for efficient transmission of terahertz wave. Finite element method with an ideally matched layer (PML) boundary condition is used to investigate its guiding properties. A cladding structure of nested anti-resonant elliptical rings is introduced to reduce mode power leakage. The NAHF shows a low confinement loss (< 0.29 cm-1 ) and a small effective material loss (< 0.019 cm-1 ) in the frequency range of 0.9-1.5 THz. An ultra-flatted near zero dispersion profile of ±0.029 ps/THz/cm is obtained within a broad frequency range of 0.6-1.5 THz. Furthermore, optimizing the structure parameters in NAHF, higher core power fraction over 80 %, higher effective mode area of ~10-6 μm2 and the bending loss of 3.05×10-5 cm-1 at the bending radius of 10 cm are also achieved.

Paper Details

Date Published: 17 December 2019
PDF: 8 pages
Proc. SPIE 11196, Infrared, Millimeter-Wave, and Terahertz Technologies VI, 111960N (17 December 2019); doi: 10.1117/12.2538781
Show Author Affiliations
Xianli Zhu, Tianjin Univ. (China)
Degang Xu, Tianjin Univ. (China)
Yuye Wang, Tianjin Univ. (China)
Jining Li, Tianjin Univ. (China)
Yixin He, Tianjin Univ. (China)
Chao Yan, Tianjin Univ. (China)
Longhuang Tang, Tianjin Univ. (China)
Jianquan Yao, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 11196:
Infrared, Millimeter-Wave, and Terahertz Technologies VI
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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