METHOD OF PRODUCING MULTIMODE LOW-DISPERSION LIGHT GUIDES Russian patent published in 2015 - IPC C03B37/18 

FIELD: physics.

SUBSTANCE: deposition of layers of quartz glass of a reflecting cladding is carried out with constant concentration of fluorine, and layers of the core are deposited with variation thereof - with decrease of the concentration of fluorine from the periphery to the centre. Deposition of the layers of quartz glass and fluorination thereof are carried simultaneously in one passage of the burner, wherein for concentration of fluorine in the layers of the core less than 0.5 at %, consumption of the fluorine-containing gas is reduced uniformly from layer to layer. The process of depositing layers of the reflecting cladding is carried out with equimolar ratio of silicon tetrachloride and oxygen in the vapour-gas mixture, where the carrier gas for the SiCl₄ vapour used is gaseous SiF₄. Further, the method includes high-temperature compression of the pipe into a rod workpiece and drawing a light guide therefrom.

EFFECT: low level of intermodal dispersion, which widens the transmission bandwidth of optical communication systems.

4 cl, 2 dwg, 1 tbl