FIELD: production of quartz fibers. SUBSTANCE: liminescent quartz fiber comprises core of quartz glass alloyed with oxide of rare-earth element, a layer of pure quartz glass, and a light-reflecting polymeric coating. Two layers of quartz glass alloyed with germanium and boron oxides, respectively, are arranged between the core and the layer of pure quartz glass, being oriented from center to periphery. EFFECT: improved characteristics. 6 dwg
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