Radiation-resistant optical fiber with oxygen-deficient silica glass core

• Published in: Materials letters Vol. 292; p. 129628
• Main Authors: Eronyan, Mikhail A., Devetyarov, Danila R., Reytskii, Alexander A., Meshkovskiy, Igor K., Untilov, Alexander A., Pechenkin, Alexander A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-06-2021; Elsevier BV
• Subjects: Attenuation; Chemical vapor deposition; Fluorosilicates; Gamma-radiation; Hypoxia; Materials science; Optical fiber; Optical fibers; Radiation effects; Radiation resistance; Radiation tolerance; Rayleigh scattering; Room temperature; Scattering; Silica glass; Silicon dioxide; Radiation resistance; Attenuation; Gamma-radiation; Scattering; Optical fiber
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2021.129628

•The proposed MCVD fibers technology prevents radiation-induced defects in them.•The oxygen deficiency in silica fiber provides its high radiation resistance.•γ-irradiation generates optical losses due to radiation scattering in fibers.•Under γ irradiation the attenuation at λ = 1.3 µm is greater than at λ = 1.55 µm.•After the termination of γ-irradiation, optical losses are fully restored.
Oxygen deficiency in a silica glass core of fluorosilicate optical fiber manufactured by the modified chemical vapor deposition method provides extra high level of its radiation resistance. Gamma-radiation-induced attenuation (RIA) in such a fiber increases with decreasing both the test temperature (from + 25 to minus 60 °C) and the wavelength (from 1.55 to 1.31 μm). After exposure to radiation, RIA completely disappears at the room temperature. At the temperature of minus 60 °C, the optical losses restore much worse. RIA increases due to the superposition of Rayleigh scattering and absorption, with the latter decreasing with increasing wavelength.