Abstract
Transmission spectra of fiber-optic structures in which transformation of modes occurs in a segment of the thin-core SM450 fiber and a thin-film coating deposited on the cladding are studied. The modes and the corresponding dispersion relations are calculated for the SM450 cladding in the absence and presence of the overlay. It is shown that the dips in the transmission spectrum are caused by interference effects. A setup is constructed for deposition of polyvinyl-alcohol films on a segment of an optical fiber with a length of up to 20 cm with the aid of pulling from solution at a pulling rate of 0.1–1.7 mm/s. Transmission spectra of the structure are measured after deposition of overlays. Spectral shifts result from deposition of thin films. Wavelength shift is determined versus the pulling rate that determines the overlay thickness.
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Translated by A. Chikishev
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Ivanov, O.V., Yusupova, L.I. & Nizametdinov, A.M. Spectra of Structures Based on Thin-Core Optical Fibers with Film Overlays. J. Commun. Technol. Electron. 65, 881–887 (2020). https://doi.org/10.1134/S1064226920070049
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DOI: https://doi.org/10.1134/S1064226920070049