Method for welding a quartz glass tube for use as an optical fiber preform
AssigneesHeraeus Quarzglas GmbH & Co. KG, Shin-Etsu Quartz Products Co., Ltd.
InventorsAtsuhi Shimada, Toshiyuki Kato, Masanori Suzuki, Yutaka Watabe
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Abstract
A method for welding a dummy tube to a quartz glass tube for use as an optical fiber preform, comprising chamfering the inner edge portion of the dummy tube and/or the quartz glass tube for use as the optical fiber preform before welding the quartz glass tube for use as the optical fiber preform with the dummy tube, and then melt welding them together.
Claims16
A welding method wherein a dummy tube having an edge plane is welded to a quartz glass tube having an edge plane for use as an optical fiber preform, which comprises chamfering the inner edge portion of the dummy tube and/or the quartz glass tube for use as the optical fiber preform before welding said quartz glass tube for use as the preform with the dummy tube, and then melt welding the respective edge planes of the dummy tube and the quartz glass tube together.
A welding method wherein a dummy tube having an outer edge portion is welded to a quartz glass tube having an outer edge portion for use as an optical fiber preform, which comprises chamfering the inner edge portion of the dummy tube and/or the quartz glass tube for use as the optical fiber preform before welding said quartz glass tube for use as the preform with the dummy tube, and then melt welding outer edge portions of the dummy tube and quartz glass tube together by heating and mutual pressure, wherein a said chamfer provides a relief to prevent a narrowing of an internal diameter of the optical fiber perform proximate to the junction.
Dependencies are inferred from the claim text.