Process and device for the heat treatment of at least one optical fibre

摘要

A method of heat-treating at least one optical fibre (FE1) involving delivery at least one heating pulse on to the respective optical fibre in such a way that the optical fibre (FE1) is melted only in the surface region (OZ) of its glass envelope (MA1) and/or its end-face surface. The optical fibre (FE1) is specifically melted only down to a surface coating depth of 50 mu. m at the most. The pulse length and/or thermal energy of the heating pulse are selected so that as large a temp. drop (TP) as possible is attained from the outer surface to the centre of the respective optical fibre.