FIELD: chemistry.
SUBSTANCE: dry, deuterium-containing gases, for example dimethylsulphoxide D6 vapours, are introduced into a tube of a fibrous light guide workpiece. Alloying of precipitable layers of a glass core and envelope with small additions of deuterium is carried out both in the process of the layer precipitation and at high-temperature tube compression.
EFFECT: reduction of the light guide optical loss and mass loss of workpieces, reduction of thereof production process duration.
2 cl, 1 tbl
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