Process for the production of a preform from which optical fibres can be drawn

摘要

The invention relates to an inexpensive production process for a chemically and physically highly accurate preform from which a highly accurate optical fibre which has a length of many kilometres and has, in particular, a low OH<-> ion content can be drawn inexpensively. A glass-forming precipitate is deposited on a cylindrical substrate rotating in the longitudinal direction by means of a plasma burner.