Verfahren zum Herstellen einer Vorform für optische Fasern durch Aussenabscheidung aus der Dampfphase

摘要

A plurality of glass particle synthesizing burners are disposed opposite to a rotating starting rod. The starting rod and the glass particle synthesizing burners are relatively reciprocally moved to each other in parallel to the axial direction, so that glass particles synthesized by the burners are sequentially deposited on the surface of the starting rod. The movement is stopped and restarted repeatedly once or more than once during one reciprocal movement. The method is for producing a preform for optical fibres by outside vapour deposition techniques.