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    • 2. 发明授权
    • Method for producing glass preform for optical fiber
    • 光纤玻璃预制棒的制造方法
    • US5364428A
    • 1994-11-15
    • US203750
    • 1994-03-01
    • Michihisa KyotoYoichi IshiguroAkira UranoHideo Kakuzen
    • Michihisa KyotoYoichi IshiguroAkira UranoHideo Kakuzen
    • C03B37/014C03B37/023
    • C03B37/01446C03B37/0146C03B2201/075C03B2201/12Y10S65/16Y10S65/90
    • A glass preform which is used for fabricating an optical fiber, has substantially no bubbles therein and contains sufficient amount of fluorine is produced by a method comprising steps of: forming a porous glass soot body from a glass-forming raw material, removing trapped gas and water from pores of the soot body by heating the soot body under pressure lower than several ten Torr. at a temperature at which the soot body is not vitrified, filling the pores of the soot body with a gas containing SiF.sub.4 and uniformly adding fluorine to the soot body, vitrifying the fluorine-added soot body into a transparent glass body, boring said transparent glass body to form a bore therein, and inserting a highly pure quartz rod in said bore to form a glass preform, or a method forming a glass soot composite body having a core portion consisting of a solid glass and a peripheral portion consisting of a porous glass mass, removing trapped gas and water from pores of the soot composite body by heating the soot composite body under a pressure lower than several ten Torr. at a temperature at which the porous glass mass is not vitrified, filling the pores in the porous glass mass of the soot composite body with a gas containing SiF.sub.4 and uniformly adding fluorine to the soot glass mass, and vitrifying the fluorine-added soot glass mass into a transparent glass mass to form a glass preform.
    • 用于制造光纤的玻璃预成型体在其中基本上没有气泡并且通过包括以下步骤的方法制造含有足够量的氟:从玻璃形成原料形成多孔玻璃烟炱体,除去被捕获的气体和 通过在低于几十乇的压力下加热烟灰体,从烟灰体的孔中吸收水分。 在烟灰体未被玻璃化的温度下,用含有SiF 4的气体填充烟灰体的孔,并将氟均匀地添加到烟炱体中,将氟化烟炱体玻璃化成透明玻璃体,使透明玻璃镗孔 在其中形成孔,并且将高纯石英棒插入所述孔中以形成玻璃预制件,或者形成玻璃烟灰复合体的方法,所述玻璃烟灰复合体具有由实心玻璃构成的芯部和由多孔玻璃构成的周边部 通过在低于几十乇的压力下加热烟灰复合体,从烟灰复合体的孔中除去捕获的气体和水。 在多孔玻璃体未被玻璃化的温度下,用含有SiF 4的气体填充烟灰复合体的多孔玻璃块中的孔,并向烟灰玻璃块均匀地加入氟,并且将添加氟的烟灰玻璃块 变成透明玻璃块以形成玻璃预制件。
    • 3. 发明授权
    • Method for producing glass preform for optical fiber
    • 光纤玻璃预制棒的制造方法
    • US5203899A
    • 1993-04-20
    • US832330
    • 1992-02-07
    • Michihisa KyotoYoichi IshiguroAkira UranoHideo Kakuzen
    • Michihisa KyotoYoichi IshiguroAkira UranoHideo Kakuzen
    • C03B37/014
    • C03B37/0146C03B37/01446C03B2201/075C03B2201/12Y10S65/16Y10S65/90
    • A glass preform which is used for fabricating an optical fiber, has substantially no bubbles therein and contains sufficient amount of fluorine is produced by a method comprising steps of: forming a porous glass soot body from a glass-forming raw material, removing trapped gas and water from pores of the soot body by heating the soot body under pressure lower than several ten Torr. at a temperature at which the soot body is not vitrified, filling the pores of the soot body with a gas containing SiF.sub.4 and uniformly adding fluorine to the soot body, vitrifying the fluorine-added soot body into a transparent glass body, boring said transparent glass body to form a bore therein, and inserting a highly pure quartz rod in said bore to form a glass preform, or a method forming a glass soot composite body having a core portion consisting of a solid glass and a peripheral portion consisting of a porous glass mass, removing trapped gas and water from pores of the soot composite body by heating the soot composite body under a pressure lower than several ten Torr. at a temperature at which the porous glass mass is not vitrified, filling the pores in the porous glass mass of the soot composite body with a gas containing SiF.sub.4 and uniformly adding fluorine to the soot glass mass, and vitrifying the fluorine-added soot glass mass into a transparent glass mass to form a glass preform.
    • 用于制造光纤的玻璃预成型体在其中基本上没有气泡并且通过包括以下步骤的方法制造含有足够量的氟:从玻璃形成原料形成多孔玻璃烟炱体,除去被捕获的气体和 通过在低于几十乇的压力下加热烟灰体,从烟灰体的孔中吸收水分。 在烟灰体未被玻璃化的温度下,用含有SiF 4的气体填充烟灰体的孔,并将氟均匀地添加到烟炱体中,将氟化烟炱体玻璃化成透明玻璃体,使透明玻璃镗孔 在其中形成孔,并且将高纯石英棒插入所述孔中以形成玻璃预制件,或者形成玻璃烟灰复合体的方法,所述玻璃烟灰复合体具有由实心玻璃构成的芯部和由多孔玻璃构成的周边部 通过在低于几十乇的压力下加热烟灰复合体,从烟灰复合体的孔中除去捕获的气体和水。 在多孔玻璃体未被玻璃化的温度下,用含有SiF 4的气体填充烟灰复合体的多孔玻璃块中的孔,并向烟灰玻璃块均匀地加入氟,并且将添加氟的烟灰玻璃块 变成透明玻璃块以形成玻璃预制件。