Paper
2 March 2020 Investigation of single-mode anti-resonant hollow-core THz fibers
Shuai Sun, Wei Shi, Quan Sheng, Guo Zhang, Yao Zhang, Zhongbao Yan, Jianquan Yao
Author Affiliations +
Abstract
Single-mode fiber plays an important role in the applications of THz technology. Serving as one of the optimal choices of THz fiber, hollow-core anti-resonant fiber (ARF) with single-layer anti-resonant elements has advantages of low transmission loss, high damage threshold, low dispersion but disadvantage of single mode which can by realized by the high-order-mode (HOM) suppression effect. In this paper, the key factor affecting the HOM suppression effect in THz ARF is investigated and confirmed to be the cross-sectional area ratio of cladding tubes inner side with fiber core, besides, the ratio will slightly change with the variation of the anti-resonant period of THz ARF where the cladding tubes have different shell thickness. By optimizing the anti-resonant elements of THz ARF from round tubes to semielliptical tubes, a high-performance single-mode THz fiber is proposed and the confinement loss of high-order-mode is confirmed larger than 24 dB/m at the same time that of fundamental-mode is controlled less than 0.4 dB/m.
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shuai Sun, Wei Shi, Quan Sheng, Guo Zhang, Yao Zhang, Zhongbao Yan, and Jianquan Yao "Investigation of single-mode anti-resonant hollow-core THz fibers", Proc. SPIE 11279, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIII, 112791Y (2 March 2020); https://doi.org/10.1117/12.2544049
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KEYWORDS
Terahertz radiation

Cladding

Optical fibers

Absorption

Fermium

Frequency modulation

Computer simulations

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