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41. 发明授权

US06807823B2 Fluorine-containing glass 有权
标题翻译：含氟玻璃
公开(公告)号：US06807823B2
公开(公告)日：2004-10-26
申请号：US10298924
申请日：2002-11-19
申请人： Yuichi Ohga , Tadashi Enomoto
发明人： Yuichi Ohga , Tadashi Enomoto
IPC分类号： C03C306
CPC分类号： C03C23/0025 , C03B19/1423 , C03B19/1453 , C03B2201/07 , C03B2201/075 , C03B2201/12 , C03B2207/30 , C03B2207/32 , C03B2207/36 , C03B2207/70 , C03C3/06 , C03C2201/11 , C03C2201/12 , C03C2201/23 , C03C2203/54
摘要： A process for producing fluorine-containing glass. An SiO2 soot is synthesized by hydrolyzing SiCl4. The soot is heated in a chlorine-compound-free atmosphere containing a fluorine compound gas to form a fluorine-containing silica glass. The glass contains not more than 10 ppm OH group, not more than 10 ppm Cl, and not less than 1,000 ppm F. The concentration ratio of F/Cl is 10,000 or more.
摘要翻译：含氟玻璃的制造方法。通过水解SiCl4合成SiO 2烟炱。烟灰在含氟化合物气体的无氯化合物的气氛中加热，形成含氟二氧化硅玻璃。该玻璃含有不超过10ppm的OH基团，不超过10ppm的Cl，且不小于1,000ppm F.F / Cl的浓度比为10,000以上。

42. 发明授权

US06427044B1 Optical fiber 失效
标题翻译：光纤
公开(公告)号：US06427044B1
公开(公告)日：2002-07-30
申请号：US09585337
申请日：2000-06-02
申请人： Eiji Yanada , Yuichi Ohga , Masashi Onishi
发明人： Eiji Yanada , Yuichi Ohga , Masashi Onishi
IPC分类号： G02B622
CPC分类号： G02B6/03666 , C03B37/027 , C03B37/02745 , C03B37/032 , C03B2201/12 , C03B2201/31 , C03B2203/36 , C03B2205/06 , C03B2205/40 , C03C25/1062 , G02B6/02014 , G02B6/02257 , G02B6/02271 , G02B6/02395 , G02B6/03611 , G02B6/03627 , G02B6/03644
摘要： The present invention relates to an optical fiber comprising a structure which yields a low optical transmission loss even when doped with a high concentration of Ge element and is excellent in reliability for strength. The optical fiber according to the present invention comprises a core region whose maximum value &Dgr;max of relative refractive index difference with respect to silica glass non-intentionally doped with impurities is 0.8% or more, in its diameter direction, a cladding region comprising silica glass non-intentionally doped with impurities or silica glass doped with a predetermined amount of fluorine, and a hermetic coat mainly composed of carbon. In particular, the transmission loss &agr; at a wavelength of 1.55 &mgr;m and the maximum value &Dgr;max satisfy the relationship of: &agr;≦0.131×(&Dgr;max)2−0.214×(&Dgr;max)+0.284 in the optical fiber according to the present invention.
摘要翻译：本发明涉及一种光纤，其包括即使掺杂高浓度的Ge元素也能够获得低的光传输损失，并且强度可靠性优异的结构。根据本发明的光纤包括芯区，其相对折射率差的相对折射率差的最大值相对于未有意掺杂杂质的石英玻璃的直径方向为0.8％以上，包含二氧化硅玻璃非晶的包层区域 - 掺杂有预定量氟的杂质或二氧化硅玻璃以及主要由碳组成的气密涂层。特别地，在1.55μm波长的传输损耗α和最大值DELTAmax满足根据本发明的光纤中的关系：

43. 发明授权

US6050108A Method for producing glass preform 有权
标题翻译：制造玻璃预制棒的方法
公开(公告)号：US6050108A
公开(公告)日：2000-04-18
申请号：US149105
申请日：1998-09-08
申请人： Tomohiro Ishihara , Yuichi Ohga , Satoshi Tanaka
发明人： Tomohiro Ishihara , Yuichi Ohga , Satoshi Tanaka
IPC分类号： G02B6/00 , B01D19/00 , C03B37/014 , C03B19/06
CPC分类号： C03B37/01446 , C03B37/0146
摘要： A method for producing a glass preform by synthesizing a porous glass preform by a vapor-phase synthesizing method and heating said porous glass preform in a vacuum or reduced-pressure atmosphere so as to consolidate said porous glass preform, which comprises the steps of: a first step of degassing said porous glass preform to thereby remove gas adsorbed or contained therein; a second step of temporarily contracting said porous glass preform at a temperature higher than a temperature in the first step and lower than a consolidation temperature; and a third step of consolidating said porous glass preform at the consolidation temperature; the degassing of said first step is determined in accordance with the bulk density of said porous glass preform.
摘要翻译：一种通过气相合成法合成多孔玻璃预成型体并在真空或减压气氛中加热所述多孔玻璃预制件以固结所述多孔玻璃预制件的方法，该方法包括以下步骤：对所述多孔玻璃预制体进行脱气以除去吸附或包含在其中的气体的第一步骤; 在高于第一步骤中的温度并低于固化温度的温度下临时收缩所述多孔玻璃预制件的第二步骤; 以及在固结温度下固化所述多孔玻璃预制件的第三步骤; 所述第一步骤的脱气是根据所述多孔玻璃预制件的体积密度来确定的。

44. 发明授权

US5106401A Process for thermal treatment of glass fiber preform 失效
标题翻译：玻璃纤维预热器的热处理工艺
公开(公告)号：US5106401A
公开(公告)日：1992-04-21
申请号：US544942
申请日：1990-06-28
申请人： Shinji Ishikawa , Yuichi Ohga , Ichiro Tsuchiya , Hiroo Kanamori , Hiroshi Yokota , Michihisa Kyoto
发明人： Shinji Ishikawa , Yuichi Ohga , Ichiro Tsuchiya , Hiroo Kanamori , Hiroshi Yokota , Michihisa Kyoto
IPC分类号： G02B6/00 , C03B37/014
CPC分类号： C03B37/01446 , C03B37/0146 , C03B2201/07 , C03B2201/075 , C03B2201/12 , Y10S65/16 , Y10S65/90
摘要： The present invention providesa process for the dehydrating and purifying treatment by heating a porous glass preform for an optical fiber by passing the porous glass preform through a muffle tube having a SiC layer at least on its inner surface at a high temperature under an atmosphere containing an inert gas and a silicon halogenide gas;a process for the fluorine-doping treatment by heating a porous glass preform for an optical fiber by passing a porous glass preform through a muffle tube having a SiC layer at least on its inner surface at a high temperature under an atmosphere containing a fluorine compound gas and an inert gas; anda process for the vitrifying treatment by heating a porous glass preform for an opticla fiber by passing the preform, which has been previously dehydrated and purified, through a muffle tube having a SiC layer at least on its inner surface at a high temperature under an atmosphere gas.

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