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Design and research of dual hollow-core anti-resonant fiber polarization beam splitter operating at 1550-nm wavelength band.

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Bibliographic Details
Title: Design and research of dual hollow-core anti-resonant fiber polarization beam splitter operating at 1550-nm wavelength band.
Authors: Tu, Xue-ying1 (AUTHOR), Li, Jian-she1,2 (AUTHOR) jianshelee@ysu.edu.cn, Zhang, Jing-qiong1 (AUTHOR), Li, Shu-guang1 (AUTHOR)
Source: European Physical Journal D (EPJ D). May2026, Vol. 80 Issue 5, p1-12. 12p.
Subjects: Beam splitters, Optical fibers, Coupled mode theory (Wave-motion), Wavelengths, Fibers, Optical fiber communication
Abstract: This paper proposes a dual hollow-core anti-resonant fiber polarizing beam splitter based on a composite structure of nested tubes and cladding tubes. Two circular cladding tubes and one circular nested tube are, respectively, introduced along the inner wall of the outer support tube on both sides of the x-axis, thereby dividing the fiber core into two symmetrically distributed cores, A and B. The air gap between them serves as the channel for dual-core mode coupling. By studying the influence of structural parameters and other factors on the performance of the beam-splitting device, the optimal device structure parameters are determined. When the device length is 5.46 cm, the Polarization Extinction Ratio is less than − 20 dB in the wavelength range of 1.54–2 μm, and polarization extinction ratios of − 48.1 dB and − 77.0 dB are achieved at 1.59 μm and 1.90 μm, respectively, covering a bandwidth of 460 nm. In the wavelength range of 1.4–1.82 μm, the extinction ratio of higher-order modes is greater than 100. This research has significant theoretical value and practical engineering significance for the construction of a complete communication fiber system transmission system. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:This paper proposes a dual hollow-core anti-resonant fiber polarizing beam splitter based on a composite structure of nested tubes and cladding tubes. Two circular cladding tubes and one circular nested tube are, respectively, introduced along the inner wall of the outer support tube on both sides of the x-axis, thereby dividing the fiber core into two symmetrically distributed cores, A and B. The air gap between them serves as the channel for dual-core mode coupling. By studying the influence of structural parameters and other factors on the performance of the beam-splitting device, the optimal device structure parameters are determined. When the device length is 5.46 cm, the Polarization Extinction Ratio is less than − 20 dB in the wavelength range of 1.54–2 μm, and polarization extinction ratios of − 48.1 dB and − 77.0 dB are achieved at 1.59 μm and 1.90 μm, respectively, covering a bandwidth of 460 nm. In the wavelength range of 1.4–1.82 μm, the extinction ratio of higher-order modes is greater than 100. This research has significant theoretical value and practical engineering significance for the construction of a complete communication fiber system transmission system. [ABSTRACT FROM AUTHOR]
ISSN:14346060
DOI:10.1140/epjd/s10053-026-01143-w