Radiation-induced attenuation in single-mode pure-silica-core optical fibers two years after high-fluence reactor irradiation
Kenzhina I.E. Kashaykin P.F. Vasiliev S.A. Zaurbekova Z.A. Askerbekov S.K. Tolenova A.U. Samarkhanov K.K. Akhanov A.M. Kulsartov T.V. Shaimerdenov A.A. Tomashuk A.L.
October 2023Academic Press Inc.
Optical Fiber Technology
2023#80
Single-mode pure-silica-core optical fibers (PSFs) coated with different materials (aluminum, copper, polyimide, or acrylate) and reactor-irradiated 2 years ago to the fast-neutron fluence of 1.8·1020n/cm2 and γ-dose of 2.3·109 Gy with evacuation to 0.005–0.25 Pa were OTDR-tested at wavelengths λ = 1.31 and 1.55 µm. Metal-coated PSFs demonstrated virtually the same radiation-induced attenuation (RIA) at λ = 1.55 µm as was measured 1 day after the irradiation (∼2–4 dB/m), whereas RIA in the polyimide-coated PSF that survived the irradiation went down from ∼4.3 to 1.8 dB/m. Fiber microbending originating from radiation-induced coating decay (not mechanical failure of the fiber itself) was argued to be the source of the catastrophic RIA rise in the polyimide- and acrylate-coated PSFs during the reactor irradiation in vacuum.
Metal-coated optical fiber , Polyimide-coated optical fiber , Pure-silica-core optical fiber , Radiation resistance , Radiation-induced attenuation RIA , Reactor irradiation , Single-mode optical fiber
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Kazakh-British Technical University, Almaty, Kazakhstan
Satbayev University, Almaty, Kazakhstan
Al-Farabi Kazakh National University, Almaty, Kazakhstan
Prokhorov General Physics Institute of the Russian Academy of Sciences, Dianov Fiber Optics Research Centre, Moscow, Russian Federation
Institute of Nuclear Physics, Almaty, Kazakhstan
Kazakh-British Technical University
Satbayev University
Al-Farabi Kazakh National University
Prokhorov General Physics Institute of the Russian Academy of Sciences
Institute of Nuclear Physics
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