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1. 发明申请

US20030053778A1 Optical fiber preform and the method of producing the same 有权
标题翻译：光纤预制棒及其制造方法
公开(公告)号：US20030053778A1
公开(公告)日：2003-03-20
申请号：US10242609
申请日：2002-09-13
申请人： THE FURUKAWA ELECTRIC CO., LTD
发明人： Yukio Koumura , Yasuhiro Naka , Nobuaki Orita
IPC分类号： G02B006/16 , C03B037/018
CPC分类号： C03B37/027 , C03B37/01446 , C03B37/01466 , C03B2205/90 , Y02P40/57 , Y10T428/24926 , Y10T428/2495
摘要： An optical fiber preform (1) serving as a material of an optical fiber has a shoulder portion (12) thrusting beyond a middle portion (M) in a base end region (K) which is on the upper side when the optical fiber preform is suspended for a drawing process. The optical fiber preform (1) of this configuration can be easily produced by appropriately setting the heating condition, etc. for the sintering step in the production process. Thus, it is possible to omit the elongating step after the sintering step, thereby simplifying the production process. Further, in the prior-art technique, turbulence is generated in the gas flow in the furnace of the drawing apparatus toward the end of the drawing step, making it impossible to draw in a stable manner. In contrast, in this embodiment, due to the shoulder portion (12), there is a small gap between the inner wall surface of the furnace and the optical fiber preform; due to this small gap, the gas flow is regulated, and the drawing can be conducted in a stable manner even toward the end of the drawing step.
摘要翻译：用作光纤材料的光纤预制件（1）具有在光纤预制件是上侧时位于上侧的基端区域（K）中的超过中间部分（M）的肩部（12）暂停绘制过程。通过在生产过程中适当地设定烧结步骤的加热条件等，可以容易地制造这种结构的光纤预制件（1）。因此，可以省略烧结步骤后的延伸工序，从而简化了制造工序。此外，在现有技术中，在拉拔装置的炉内的气流中产生湍流，使得不可能稳定地绘制。相反，在本实施方式中，由于肩部（12），炉内壁面和光纤预制体之间存在小间隙，由于这种小的间隙，气流被调节，并且即使在拉拔步骤结束时也可以以稳定的方式进行拉伸。

2. 发明申请

US20030063880A1 Optical fiber base material, its manufacturing method and optical fiber 有权
标题翻译：光纤基材，其制造方法和光纤
公开(公告)号：US20030063880A1
公开(公告)日：2003-04-03
申请号：US10100911
申请日：2002-03-20
申请人： The Furukawa Electric Co., Ltd.
发明人： Yukio Koumura , Kazuto Hirabayashi
IPC分类号： G02B006/22 , G02B006/16 , C03B037/027
CPC分类号： C03C13/04 , C03B37/01446 , C03B2201/20 , C03B2203/23 , G02B6/02214 , G02B6/0286 , G02B6/03611 , G02B6/03627 , Y02P40/57
摘要： A porous glass intermediate body constructed by a core original layer formed as a core portion of an optical fiber, and a first clad original layer formed as a first clad portion of the optical fiber is formed. Thereafter, a transparent glass intermediate body is made by consolidating the porous glass intermediate body within an atmospheric gas with a chlorine-based gas with no fluorine compound. Thereafter, a porous optical fiber base material is made by forming a second clad original layer as a second clad portion of the optical fiber on the circumferential surface of the transparent glass intermediate body. When a porous state is then maintained, the porous optical fiber base material is dehydrated within the atmospheric gas with a chlorine concentration higher than that during the consolidation of the porous glass intermediate body. Thereafter, an optical fiber base material is manufactured by consolidating the porous optical fiber base material within a similar atmospheric gas. The optical fiber is made by wire-drawing this optical fiber base material.
摘要翻译：形成由形成为光纤的芯部的芯原始层构成的多孔玻璃中间体，以及形成为光纤的第一包层部的第一包层原始层。此后，通过将气体中的多孔玻璃中间体与不含氟化合物的氯系气体固结而制成透明玻璃中间体。此后，通过在透明玻璃中间体的圆周表面上形成作为光纤的第二包层部分的第二包层原始层来制造多孔光纤基材。当保持多孔状态时，多孔光纤基材在大气气体中脱水，其氯浓度高于多孔玻璃中间体固结期间的氯浓度。此后，通过将多孔光纤基材固结在类似的气氛气体中来制造光纤基材。该光纤通过拉丝该光纤基材而制成。

3. 发明申请

US20020057879A1 Optical fiber preform 有权
标题翻译：光纤预制棒
公开(公告)号：US20020057879A1
公开(公告)日：2002-05-16
申请号：US09949732
申请日：2001-09-12
申请人： THE FURUKAWA ELECTRIC CO., LTD.
发明人： Yukio Koumura , Masahide Kuwabara , Kazuto Hirabayashi
IPC分类号： G02B006/02
CPC分类号： C03B37/01493 , C03B37/01205 , C03B2207/70 , Y02P40/57
摘要： An optical fiber preform is a material used for fabricating optical fibers. The optical fiber preform has a target rod which will be the core for optical fibers and a glass layer formed around the outside thereof. A mass W (kg) of the optical fiber preform and a diameter D (cm) of the target rod satisfy a relational expression 0.4null(W)1/2
摘要翻译：光纤预制件是用于制造光纤的材料。光纤预制棒具有作为光纤的芯的目标棒和在其外侧形成的玻璃层。光纤预制棒的质量W（kg）和目标棒的直径D（cm）满足关系式0.4（W）1/2

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