| 摘要 |
PURPOSE:To obtain glass having a desired refractive index for a base material for an optical fiber or the like by decomposing a vapor-phase starting material for glass and a vapor-phase dopant, vitrifying the resulting oxide powder for glass, and spraying it on a surface for depositing glass. CONSTITUTION:A vapor-phase starting material for glass such as SiCl4 and a vapor-phase dopant such as GeCl4 or POCl3 are subjected to thermal decomposition or flame hydrolysis to form oxide powder for glass. The powder is vitrified by a plasma heating method, and it is sprayed and deposited on a surface for depositing glass such as the surface of a quartz rod to obtain glass having a desired refractive index of a base material for an optical fiber, a rod lens or the like. |
