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1. 发明授权

US4406684A Core torch for fabricating single-mode optical fiber preforms 失效
标题翻译：用于制造单模光纤预制棒的核心手电筒
公开(公告)号：US4406684A
公开(公告)日：1983-09-27
申请号：US386752
申请日：1982-06-09
申请人： Masao Kawachi , Satoru Tomaru , Takao Edahiro , Shoichi Suto
发明人： Masao Kawachi , Satoru Tomaru , Takao Edahiro , Shoichi Suto
IPC分类号： C03B37/014 , C03B19/06
CPC分类号： C03B37/0144 , C03B37/014 , C03B2203/22 , C03B2203/24 , C03B2207/04 , C03B2207/06 , C03B2207/10 , C03B2207/16 , C03B2207/18 , C03B2207/20 , C03B2207/42 , C03B2207/50 , C03B2207/60 , C03B2207/64 , Y02P40/57 , Y10S65/90
摘要： A core torch for fabricating a single-mode optical fiber preform wherein fine glass particles are produced eccentrically with respect to the center area of a flame stream, the core torch being so arranged as to blow the flame stream at an angle inclined to a seed rod. The porous glass body forming the core is grown on one end of the rod and in the direction of the axis of the rod. A cladding layer is formed on the periphery of the porous glass core body by at least one torch for forming the cladding. The obtained porous glass body is heated and vitrified into a transparent glass body, which is sealed in a silica tube for jacketting to form a single-mode optical fiber preform. At least one exhaust port is disposed within a distance of 1 mm to 50 mm from the periphery of the porous glass body and in the vicinity of the growing surface of the glass body to exhaust residual glass fine particles and undesired gases. A porous glass body having a diameter of 20 mm or less is easily formed. Single-mode optical fiber having a cladding-to-core-diameter ratio of 3 or more is fabricated by the VAD method. Accordingly, a long-length and low-loss single-mode optical fiber is mass-produced.
摘要翻译：一种用于制造单模光纤预制件的核心手电筒，其中相对于火焰流的中心区域产生偏心的细玻璃颗粒，所述芯焊炬布置成以与种子杆倾斜的角度吹动火焰流。形成芯的多孔玻璃体在棒的一端和棒的轴线方向上生长。通过用于形成包层的至少一个焊炬在多孔玻璃芯体的周边上形成包覆层。将得到的多孔玻璃体加热并玻璃化成透明玻璃体，将其密封在用于夹套的石英管中，形成单模光纤预制棒。至少一个排气口设置在与多孔玻璃体的周边1mm至50mm的距离内，并且在玻璃体的生长表面附近，以排出残余的玻璃微粒和不期望的气体。容易形成直径为20mm以下的多孔玻璃体。通过VAD法制造包芯到芯直径比为3以上的单模光纤。因此，大批量生产长长度和低损耗的单模光纤。

2. 发明授权

US4345928A Fabrication method of single-mode optical fiber preforms 失效
标题翻译：单模光纤预制棒的制作方法
公开(公告)号：US4345928A
公开(公告)日：1982-08-24
申请号：US188914
申请日：1980-09-19
申请人： Masao Kawachi , Satoru Tomaru , Takao Edahiro , Shoichi Suto
发明人： Masao Kawachi , Satoru Tomaru , Takao Edahiro , Shoichi Suto
IPC分类号： C03B37/014 , C03B19/06
CPC分类号： C03B37/0144 , C03B37/014 , C03B2203/22 , C03B2203/24 , C03B2207/04 , C03B2207/06 , C03B2207/10 , C03B2207/16 , C03B2207/18 , C03B2207/20 , C03B2207/42 , C03B2207/50 , C03B2207/60 , C03B2207/64 , Y02P40/57 , Y10S65/90
摘要： A method of fabricating a single-mode optical fiber preform wherein a core torch produces fine glass particles eccentrically with respect to the center area of a flame stream, the core torch being so arranged as to blow the flame stream at an angle inclined to a seed rod. The porous glass body forming the core is grown on one end of the rod and in the direction of the axis of the rod. A cladding layer is formed on the periphery of the porous glass core body by at least one torch for forming the cladding. The obtained porous glass body is heated and vitrified into a transparent glass body, which is sealed in a silica tube for jacketting to form a single-mode optical fiber preform. At least one exhaust port is disposed within a distance of 1 mm to 50 mm from the periphery of the porous glass body and in the vicinity of the growing surface of the glass body to exhaust residual glass fine particles and undesired gases. A porous glass body having a diameter of 20 mm or less is easily formed. Single-mode optical fiber having a cladding-to-core-diameter ratio of 3 or more is fabricated by the VAD method. Accordingly, a long-length and low-loss single-mode optical fiber is mass-produced.
摘要翻译：一种制造单模光纤预成型件的方法，其中芯焊炬相对于火焰流的中心区域偏心地产生细微的玻璃颗粒，所述芯炬被布置成以与种子倾斜的角度吹动火焰流竿。形成芯的多孔玻璃体在棒的一端和棒的轴线方向上生长。通过用于形成包层的至少一个焊炬在多孔玻璃芯体的周边上形成包覆层。将得到的多孔玻璃体加热并玻璃化成透明玻璃体，将其密封在用于夹套的石英管中，形成单模光纤预制棒。至少一个排气口设置在与多孔玻璃体的周边1mm至50mm的距离内，并且在玻璃体的生长表面附近，以排出残余的玻璃微粒和不期望的气体。容易形成直径为20mm以下的多孔玻璃体。通过VAD法制造包芯到芯直径比为3以上的单模光纤。因此，大批量生产长长度和低损耗的单模光纤。

3. 发明授权

US4367085A Method of fabricating multi-mode optical fiber preforms 失效
标题翻译：制造多模光纤预制棒的方法
公开(公告)号：US4367085A
公开(公告)日：1983-01-04
申请号：US188916
申请日：1980-09-19
申请人： Shoichi Suto , Fumiaki Hanawa , Masao Kawachi , Takao Edahiro , Motohiro Nakahara
发明人： Shoichi Suto , Fumiaki Hanawa , Masao Kawachi , Takao Edahiro , Motohiro Nakahara
IPC分类号： C03B37/014 , C03B19/06 , C03B37/07
CPC分类号： C03B37/014 , C03B37/0144 , C03B2203/22 , C03B2203/24 , C03B2207/04 , C03B2207/06 , C03B2207/10 , C03B2207/16 , C03B2207/18 , C03B2207/20 , C03B2207/42 , C03B2207/50 , C03B2207/60 , C03B2207/64 , Y02P40/57
摘要： A method of fabricating an optical fiber preform wherein a synthesizing torch is inclined between 10.degree. and 60.degree. with respect to the rotation axis of a seed rod. Moving the rod while rotating it, a glass raw material gas and a flame forming gas are blown out individually from the torch to synthesize glass particles which are deposited onto one end of the rod, so that a cylindrical porous preform is grown in the direction of the rotation axis of the rod. Then the porous preform is heated at a high temperature to vitrify the porous preform into a transparent optical fiber preform. At least one exhaust port is disposed at a distance of 1 mm to 50 mm from the periphery of the porous preform and in the vicinity of the growing surface of the porous preform. In fabricating the porous preform the outer diameter fluctuations are small, and the preform is formed stably without formation of cracking on the periphery of the preform.
摘要翻译：一种制造光纤预制件的方法，其中合成炬相对于种棒的旋转轴线在10°和60°之间倾斜。在旋转杆的同时移动杆，玻璃原料气体和火焰形成气体从喷枪单独吹出以合成沉积在杆的一端上的玻璃颗粒，使得圆柱形多孔预制棒沿着杆的旋转轴线。然后将多孔预成型件在高温下加热以使多孔预成型件玻璃化成透明的光纤预制件。至少一个排气口设置在多孔预型件的周边1mm至50mm的距离处，并且在多孔预型件的生长表面附近。在制造多孔预成型件时，外径波动小，并且预成型件稳定地形成，而在预成型件的周边没有形成开裂。

4. 发明授权

US4414012A Fabrication methods of doped silica glass and optical fiber preform by using the doped silica glass 失效
标题翻译：通过掺杂石英玻璃制备掺杂石英玻璃和光纤预制棒的方法
公开(公告)号：US4414012A
公开(公告)日：1983-11-08
申请号：US300296
申请日：1981-09-08
申请人： Shoichi Suto , Hiroyuki Suda , Fumiaki Hanawa , Motohiro Nakahara , Nobuo Inagaki
发明人： Shoichi Suto , Hiroyuki Suda , Fumiaki Hanawa , Motohiro Nakahara , Nobuo Inagaki
IPC分类号： C03B20060101 , C03B19/10 , C03B37/014 , C03C3/06 , C03C13/04 , C03B19/06 , C03B20/00
CPC分类号： C03B19/106 , C03B19/102 , C03B37/01413 , C03B37/0142 , C03B37/01486 , C03C13/045 , C03C3/06 , C03B2203/24 , C03B2203/26 , C03B2207/06 , C03B2207/20 , C03B2207/28 , C03B2207/50 , C03B2207/64 , C03B2207/87 , C03C2201/30 , C03C2201/40 , C03C2203/40
摘要： Manufacturing method of doped silica glass suitable for optical fiber wherein quartz powder or SiO.sub.2 glass fine particles are exposed to a gas for producing the doped silica glass containing SiCl.sub.4, a gaseous additive and water vapor (H.sub.2 O) to add the dopant to the glass body, and then the resulting glass body is fused at a high temperature, thereby producing a transparent doped silica glass in which the production of the glass particles, the addition of the dopant, and the vitrification of the glass body are carried out by separate steps under respective suitable conditions. The manufacturing speed is remarkably increased because of the separate steps. The content of the dopant is not limited, but can be adjusted with any desired amount by changing the reaction time of dissolution. Dopant components like PbO.sub.2, SnO.sub.2, ZnO which were typically not added to the glass body can now be added thereto. Also, a method of manufacturing an optical fiber preform is disclosed wherein the doped silica glass is deposited and fused on a starting material which is inclined by an angle within a range of 5.degree.-90.degree. with respect to a blow-off direction of the flow of the doped silica glass to form a transparent doped silica glass body having a uniform outer diameter and a uniform boundary surface at a high synthesizing speed. This latter method aids mass production of optical fibers at low cost.
摘要翻译：适用于光纤的掺杂二氧化硅玻璃的制造方法，其中将石英粉末或SiO 2玻璃微粒暴露于用于生产含SiCl4，气态添加剂和水蒸汽（H 2 O）的掺杂石英玻璃的气体中以将掺杂剂添加到玻璃体中，然后将所得的玻璃体在高温下熔融，由此制备透明掺杂的石英玻璃，其中玻璃颗粒的产生，掺杂剂的添加和玻璃体的玻璃化在各自的步骤下通过各自的步骤进行适合条件。由于单独的步骤，制造速度显着增加。掺杂剂的含量没有限制，但可以通过改变溶解的反应时间以任何所需的量进行调节。现在可以向其中加入通常不加入到玻璃体中的掺杂剂组分如PbO 2，SnO 2，ZnO。此外，公开了一种制造光纤预制棒的方法，其中将掺杂的石英玻璃沉积并熔合在起始材料上，所述起始材料相对于所述材料的吹出方向倾斜5°-90°的范围内的角度掺杂石英玻璃的流动，以形成具有均匀外径和高合成速度的均匀边界表面的透明掺杂石英玻璃体。后一种方法有助于以低成本大量生产光纤。

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