摘要:
Fused silica boules (19) having improved radial homogeneity are produced by controlling the air flow around the boule (19) during its formation. The boule is formed in a cup-like containment vessel (13) which collects silica particles from a plurality of burners (14). The containment vessel (13) rotates and oscillates relative to the burners (14) as the boule (19) is formed. The containment vessel (13) is bounded by a cup-like containment wall (22), and a shadow or air flow wall (130) is spaced apart from and surrounds the containment wall (22) forming a gap or air flow passage (175) therebetween. A radially-outwardly extending deflecting wedge portion (23) is formed at the upper extent of the containment wall (22) and at an outlet end of flow passage (175). An upwardly and outwardly tapered surface (131) at the upper end of the air flow wall (130) complements an upwardly and outwardly deflection surface (123) formed on the deflection wedge (23) to form a radially-outwardly and upwardly flow passage (176) for discharging the flow from passage (175). The radially-outwardly and upwardly directed flow passage (176) deflects air infiltrated through the passage (175) outwardly away from the boule (19) so as to reduce and minimize the effects of infiltrated air on the boule.
摘要:
Methods and apparatus for producing fused silica members having high internal transmission are disclosed. The apparatus and methods are capable of producing fused silica having internal transmission of at least 99.65%/cm at 193 nm.
摘要翻译:公开了用于生产具有高内部透射率的熔融二氧化硅构件的方法和设备。 该装置和方法能够在193nm下生产具有至少99.65%/ cm 3的内透射率的熔融石英。
摘要:
A method of manufacturing an optical waveguide preform includes providing a first process gas atmosphere to a soot preform contained in a vessel. The first atmosphere is held in the vessel for a first reacting time sufficient to at least partially dope or dry the soot preform. The vessel is then at least partially refilled with a second doping or drying atmosphere. The second doping or drying atmosphere is held in the vessel for a second reacting time sufficient to further dope or dry the soot preform.
摘要:
Methods and apparatus for adding metals such as aluminum to fused silica glass articles are disclosed. The methods and apparatus allow for controlled, low level addition of metals into fused silica glass articles. The fused silica glass articles containing added aluminum exhibit improved internal transmission and decreased absorption change when irradiated with a laser.
摘要:
Methods and apparatus for producing fused silica members having high internal transmission are disclosed. The apparatus and methods are capable of producing fused silica having internal transmission of at least 99.65%/cm at 193 nm.
摘要翻译:公开了用于生产具有高内部透射率的熔融二氧化硅构件的方法和设备。 该装置和方法能够在193nm下生产具有至少99.65%/ cm 3的内透射率的熔融石英。
摘要:
Fused silica boules (19) having improved radial homogeneity are produced by controlling the air flow around the boule (19) during its formation. The boule is formed in a cup-like containment vessel (13) which collects silica particles from a plurality of burners (14). The containment vessel (13) rotates and oscillates relative to the burners (14) as the boule (19) is formed. The containment vessel (13) is bounded by a cup-like containment wall (22), and a shadow or air flow wall (130) is spaced apart from and surrounds the containment wall (22) forming a gap or air flow passage (175) therebetween. A radially-outwardly extending deflecting wedge portion (23) is formed at the upper extent of the containment wall (22) and at an outlet end of flow passage (175). An upwardly and outwardly tapered surface (131) at the upper end of the air flow wall (130) complements an upwardly and outwardly deflection surface (123) formed on the deflection wedge (23) to form a radially-outwardly and upwardly flow passage (176) for discharging the flow from passage (175). The radially-outwardly and upwardly directed flow passage (176) deflects air infiltrated through the passage (175) outwardly away from the boule (19) so as to reduce and minimize the effects of infiltrated air on the boule.