The radiation resistance nature of single-mode optical fiber with an oxygen-deficient silica glass core

• Published in: Materials letters 2022-07, Vol.318, p.131948, Article 131948
• Main Authors: Devetyarov, Danila.R., Eronyan, Mikhail.A.
• Format: Article
• Language: English
• Subjects: Attenuation; Cladding; Fluorosilicate cladding; Fluorosilicates; Gamma irradiation; Hypoxia; Materials science; Optical fibers; Optical properties; Oxygen; Oxygen content; Radiation dosage; Radiation tolerance; Radiation-induced attenuation; Radiation-optical stability; Signal processing; Silica glass; Single-mode fiber; γ - irradiation
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2022.131948

•The radiation resistance of single-mode fiber is determined by both the core and the cladding.•The oxygen content in silica glass affects its radiation resistance.•The stability of radiation-induced defects in silica glass decreases with increase in oxygen deficiency.•Gamma radiation affects the phonon optical properties spectrum of glass. The radiation resistance of single-mode fluorosilicate optical fiber with oxygen deficiency in a silica glass core was investigated. Fiber has been made by MCVD method. At γ-irradiation by a dose of 0.12 MGy optical fibers have shown two processes of change of signal attenuation different in velocity both at radiation processing and after its end. The difference in attenuation of optical fiber at wavelengths of 1.31 µm and 1.55 µm can be caused by higher radiation resistance of the fiber core material in comparison with the fiber fluorosilicate cladding. Our hypothesis is that this is due to the increased oxygen content in the cladding compared to the core, which leads to more prominent destruction of the glass matrix of the cladding and change in its optical properties.