Rod-shaped preform for making an optical fiber from it, methods for making a rod-shaped preform and for making an optical fiber, and optical fiber

摘要

"STEM FORM OF A STEM FOR MANUFACTURE OF AN OPTICAL FIBER FROM THEM, METHODS FOR MANUFACTURE OF A STEM FORM AND FOR MANUFACTURE OF AN OPTICAL FIBER". The present invention relates to a rod-shaped preform for the manufacture of an optical fiber from it, as well as a method for manufacturing such a rod-shaped preform. In addition, the present invention relates to a method for manufacturing an optical fiber, wherein one end of the rod-shaped preform is heat treated, after which the thus softened end of the rod-shaped preform is formed. The stem is subjected to a tensile force for the purpose of extracting an optical fiber from it.