Abstract
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.
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