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Performance of special radiation-hardened optical fibers intended for use in the telecom spectral windows at a megagray level

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5 Author(s)
Tomashuk, A.L. ; Gen. Phys. Inst., Acad. of Sci., Moscow, Russia ; Dianov, E.M. ; Golant, K.M. ; Khrapko, R.R.
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Gamma-radiation-induced absorption spectra (2.15 MGy(Si)) are compared in N-doped and pure silica fibers fabricated by surface plasma CVD-process under different regimes with the aim to reveal the chief absorption mechanisms in the telecom spectral windows and to work out an optimum fiber design. The long wavelength absorption edge is shown to be the main absorption mechanism at megagray doses. Its value increases with increasing bonded hydrogen concentration in the fiber glass network and is slightly greater in N-doped fibers. No nitrogen-related color centers have been revealed in the short wavelength loss edge, which is determined by chlorine impurity in silica

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Nuclear Science, IEEE Transactions on  (Volume:45 ,  Issue: 3 )