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Gamma-ray induced losses of pure silica core and GeO2 added core single mode optical fibers (Si-SMF and Ge-SMF) at 1.30 μm were investigated. Kinetic study on recovery curves of their γ-ray induced losses, showed that the induced loss could be divided approximately into two terms: one is dependent mainly on total dose and the other is dependent on dose rate, which has a tendency toward saturation when increasing total dose and was also represented by 3 components with different relaxation times The former term which is dependent mainly on the total dose was found to be due to IR tail absorption caused by irradiation and to be associated with the Si-E′ center for the Si-SMF and the Ge(l) and Ge(2) centers for the Ge-SMF, respectively.
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Kyoto et al. (1989) studied this question.
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