Patent ID: 6600857
Filing Date: 2003-07-29
Classification: C03B,C03C,G02B

Abstract:
A method for manufacturing an optical fiber base material which is used as the base body of an optical fiber, the method comprising the steps of:preparing a core in which germanium is doped; forming a first clad layer, in which both germanium and fluorine are doped, around the core to produce a first clad base; and forming a second clad layer around the first clad base, wherein the first clad base is formed by a method comprising the steps of: preparing a quartz axis; depositing silica soot, in which germanium is doped, on the quartz axis to form a silica soot layer; removing the quartz axis from the silica soot layer; sintering the silica soot layer in the fluorine atmosphere to form a sintering glass shell; etching and polishing the sintering glass shell to form a polished glass shell; and inserting the core into the polished glass shell.