15 January 1990 Radiation Damage And Radiation Induced Loss In Optical Fibres
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Abstract
The radiation induced loss in optical fibres is initially determined by the preform properties, the fibre draw conditions, and the radiation test parameters. We have found that some fibres change their radiation sensitivity considerably after expsoure to high dose values (105 - 106 rd) and explain this with radiation damage, i.e. the production of new precursors for colour centres in concentrations comparable or even higher than those of the initial ones. To get further informations about the nature of eventually generated new defects, we compared the transient induced loss of damaged and undamaged fibres as well as measured the wavelength dependence of the induced loss with increasing 60Co gamma dose. Some fibres (polymer fibres and OH rich fibres with pure SiO2 core) showed considerable permanent damage, whereas Ge doped fibres (single mode as well as graded index) remained nearly unchanged up to 106 rd.
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H. Henschel, H. Henschel, O. Kohn, O. Kohn, H. U. Schidt, H. U. Schidt, } "Radiation Damage And Radiation Induced Loss In Optical Fibres", Proc. SPIE 1174, Fiber Optics Reliability: Benign and Adverse Environments III, (15 January 1990); doi: 10.1117/12.963227; https://doi.org/10.1117/12.963227
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