doi:https://doi.org/10.30898/1684-1719.2021.9.7

Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2021. №9
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Full text in Russian (pdf)

DOI: https://doi.org/10.30898/1684-1719.2021.9.7

UDC: 666.189.2

Quartz-quartz type light guides with low losses and a thin polymer shell for the near-IR spectral range

I. P. Shilov, A. A. Zamyatin, A. A. Makovetsky, L. Yu. Kochmarev

Kotelnikov Institute of Radio Engineering and Electronics, Fryazino Branch, 141190, pl. acad. Vvedenskogo, 1, Fryazino, Russia

The paper was received August 31, 2021

Abstract. The issues of obtaining silica optical fibers with SiO₂/SiO₂-F composition (where SiO₂ is a core, and SiO₂-F is a light-reflecting cladding) with low optical losses for the near-IR spectral range are considered. This fiber type is widely used in various fields of science and technology, including laser medicine. The study results of the dependence of the numerical aperture and fluorine concentration in silica glass of the formed fiber preforms on the Freon (C₃F₈) consumption in the gas phase when using a waveguide-type microwave plasmotron at the H₁₀ wavelength, are presented. It is showed that to increase the fluorimeters sensitivity in the near-IR spectral range as probe fibers for detecting luminescence, it is promising to use quartz-quartz fibers with the “Heraeus” glass core and the reflective SiO₂-F cladding with an increased fluorine content in the glass (up to 7 wt. %). In this case, the numerical aperture of such fibers will reach values up to 0.32. For laser procedures in ophthalmology, surgery, phlebology and etc., optical fibers with a standard numerical aperture 0.20-0.24 can be used (with a fluorine concentration in the glass up to 3 wt. %).

Key words: quartz optical fibers, near-IR spectral range, laser medicine, microwave plasmotrons, fiber preforms.

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For citation:

Shilov I.P., Zamyatin A.A., Makovetsky A.A., Kochmarev L.Yu. Quartz-quartz type light guides with low losses and a thin polymer shell for the near-IR spectral range. Zhurnal Radioelektroniki [Journal of Radio Electronics]. 2021. №9. https://doi.org/10.30898/1684-1719.2021.9.7