mehrdüsiger tubular plasma - deposition burners for the production of preforms for optical fibers as semi-finished products

摘要

The present invention relates to a multi-jet, tubular plasma - deposition burners as semi-finished products for the production of preforms for optical fibers, wherein the burner a media flow, comprising glass raw material and a carrier gas, is supplied, means for the supply of at least one dopant via at least one precursor gas as well as a substantially vertical orientation of the longitudinal axis of the burner to the central axis of the substrate. According to the invention, a first partial stream of a first gas or gas mixture, in particular a precursor gas and by way of at least one running in longitudinal axis of the burner nozzle the plasma and the substrate and a second partial stream of the first or another gas or gas mixture, in particular precursor gas, via a further nozzle, the plasma and the substrate is supplied in such a way that the above-mentioned partial flows in the vicinity of the substrate combine.