Method for manufacturing optical fiber preform.

摘要

A method for manufacturing a preform having steps of obtaining a plastic material by kneading silica powder, a binder, water, and a surfactant, and obtaining a porous preform (99) by extrusion-molding the plastic material. According to this method, a porous preform (99), which can obtain an optical fiber exerting high mechanical strength, can be efficiently manufactured without generating bubble. <IMAGE>