METHOD AND DEVICE FOR SYNTHESIZING POROUS BASE MATERIAL FOR OPTICAL FIBER

摘要

PURPOSE:To provide a method (device) for synthesizing a porous base material for optical fiber improved in the sticking rate of a glass particulate to the porous base material for optical fiber. CONSTITUTION:In the case of spraying the glass particulate from a burner 2 to a core rod 1 to be a clad part of the optical fiber by introducing a raw material gas such as SiCl4 and GeCl4 and a combustion gas such as hydrogen and oxygen to the burner 2 to be stuck and deposited on the core rod 1, an electrode wire 3 is inserted to the burner 2 and by applying voltage of alternate positive and negative polarity to the electrode wire 3, the glass particulate 7 is positively and negatively charged. As a result, because the combination of the glass particulate 7 with each other is accelerated in a space between the burner and the core rod 1 and the granulation proceeds, the sticking ratio of the glass particulate on the core rod 1 is improved.