| 摘要 |
PURPOSE:To provide a base material for rare earth element-doped quartz glass optical fiber and its production used for optical fiber laser. CONSTITUTION:The objective base material for rare earth element-doped quartz glass optical fiber consists of such a quartz glass as the main component that is doped with rare earth elements, fluorine, and one or more metal elements selected from alkali metals, alkaline-earth metals, group III metals and IVA metals. Or the base material consists of a core of this quartz glass and a clad of pure quartz glass or fluorine-doped quartz glass. In the production method of the base material, rare earth elements and one or more metal elements selected from alkali metals, alkaline earth metals, group III metals and IVA metals are added to a porous glass base material produced by flame hydrolysis method, and then the base body is sintered in an atmosphere containing fluorine. Then, the porous glass base material is doped with these metal compds. which are fluorinated. |
