| http://www.w3.org/ns/prov#value | - The sheath material and the protective layer of the optical fiber according to the present invention may be formed by coating the surface of a core component comprising a quartz glass core or an organic polymer with a solution of each polymer for protection dissolved in a solvent, such as ethyl acetate, dimethylformamide or dimethylacetamide, by the coating or immersion method or alternatively by
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