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<p>In order to further improve the birefringence performance of hollow-core anti-resonant fibers (HC-ARFs), an HC-ARF with a three-unit nested semi-tube structure is proposed, and the influence of its structural parameters on the effective refractive index, modal birefringence is comprehensively and systematically analyzed. Numerical results demonstrate that after parameter optimization, the modal birefringence can reach up to 6.17 × 10<sup>− 4</sup> at the wavelength of 1.55&#xa0;μm. This research provides valuable insights for promoting the application of high-performance HC-ARFs in the fields such as high-speed optical communications, high-precision fiber sensing and advanced polarization devices.</p>

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A high-birefringence hollow-core anti-resonant fiber with three-unit nested semi-tube structures

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • Erlei Wang,
  • Jiakang Li,
  • Yuxiang Wang,
  • Jia Li,
  • Wei Liu

摘要

In order to further improve the birefringence performance of hollow-core anti-resonant fibers (HC-ARFs), an HC-ARF with a three-unit nested semi-tube structure is proposed, and the influence of its structural parameters on the effective refractive index, modal birefringence is comprehensively and systematically analyzed. Numerical results demonstrate that after parameter optimization, the modal birefringence can reach up to 6.17 × 10− 4 at the wavelength of 1.55 μm. This research provides valuable insights for promoting the application of high-performance HC-ARFs in the fields such as high-speed optical communications, high-precision fiber sensing and advanced polarization devices.