| 摘要 |
In an optical fiber preform manufacturing method including: exposing a soot-deposited object to a high temperature of 1000 to 1300°C in a chlorine-containing atmosphere to dehydrate the soot-deposited object, the soot-deposited object being formed by deposition of silicon dioxide soot; and vitrifying the soot-deposited object into a transparent glass by exposing the soot-deposited object to a high temperature of 1300 to 1600°C in an atmosphere containing inert gas and fluorine compound gas, but not containing oxygen, the fluorine compound gas does not contain carbon. |
