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Abstract <p>Samples of optical silica fibers with a reflective cladding made of amorphous perfluorinated copolymers of perfluoro-2,2-di-methyl-1,3-dioxol and perfluoro(propyl vinyl ether) are fabricated. The copolymers have high optical transparency and an ultralow refractive index <i>n</i> = 1.293–1.314 in the visible and near-IR wavelength ranges, which makes it possible to form optical fibers with a high numerical aperture. The polymer cladding is deposited on the silica light-guiding core of the fiber by a die method both from melts and from copolymer solutions. The optical losses, aperture and scattering properties of the formed silica-polymer fibers are studied. They are compared with the optical properties of fibers with light-reflecting claddings made of organosilicon elastomers and polycrystalline fluoropolymers.</p>

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Optical Properties of High Numerical Aperture Silica Fibers Coated with Amorphous Perfluorinated Polymers

  • 期刊论文

  • 发表日期：

    2025年5月31日

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  • V. I. Sokolov,
  • I. O. Goriachuk,
  • A. A. Zamyatin,
  • A. A. Makovetskii,
  • D. V. Ryakhovskiy

摘要

Abstract

Samples of optical silica fibers with a reflective cladding made of amorphous perfluorinated copolymers of perfluoro-2,2-di-methyl-1,3-dioxol and perfluoro(propyl vinyl ether) are fabricated. The copolymers have high optical transparency and an ultralow refractive index n = 1.293–1.314 in the visible and near-IR wavelength ranges, which makes it possible to form optical fibers with a high numerical aperture. The polymer cladding is deposited on the silica light-guiding core of the fiber by a die method both from melts and from copolymer solutions. The optical losses, aperture and scattering properties of the formed silica-polymer fibers are studied. They are compared with the optical properties of fibers with light-reflecting claddings made of organosilicon elastomers and polycrystalline fluoropolymers.