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1. 发明公开

EP2803643A1 OPTICAL FIBER PRODUCTION METHOD AND PRODUCTION DEVICE, AND OPTICAL FIBER 有权
标题翻译： GLASFASERHERSTELLUNGSVERFAHREN UND -ORRICHTUNG SOWIE GLASFASER
公开(公告)号：EP2803643A1
公开(公告)日：2014-11-19
申请号：EP13736334.7
申请日：2013-01-09
申请人： Sumitomo Electric Industries, Ltd.
发明人： ENOMOTO, Tadashi , OKAZAKI, Iwao , YAMAZAKI, Takashi , HAYAKAWA, Masatoshi , SHIOZAKI, Manabu , UENOYAMA, Norihiro , FURUSYOU, Masaru
IPC分类号： C03B37/027 , G02B6/00
CPC分类号： C03B37/029 , C03B37/0253 , C03B37/027 , C03B37/02727 , C03B2205/30 , C03B2205/40 , C03B2205/56 , C03B2205/63 , C03B2205/70 , C03B2205/92 , G02B6/10 , G02B2006/12166 , Y02P40/57
摘要： The present invention provides a method and an apparatus for producing an optical fiber in which the increase in transmission loss is reduced while the variation in the diameter of a glass fiber is suppressed using an inexpensive inert gas or the like and inexpensive auxiliary devices, and provides an optical fiber to be produced using the method and the apparatus. The apparatus is equipped with a susceptor (13) into which an optical fiber preform (11) is inserted and a heater (15) disposed outside the susceptor to heat the susceptor from the outside and produces an optical fiber by drawing a glass fiber (12) while the optical fiber preform is heated and melted and by drawing out the fiber through the outlet at the lower section of the susceptor to the outside. A gas containing 50% or more of argon or nitrogen is used as a gas to be supplied into the susceptor, and a protective pipe (17) with a length of Da (mm) is provided under the susceptor, the protective pipe having a heat insulating region (17a) enclosed with a heat insulator (18) with a length of Db (mm) at the upper section thereof and a non-heat insulating region (17b) not enclosed with any heat insulators at the lower section thereof, and settings are made so that the temperature of the glass fiber at the outlet of the protective pipe becomes 1700°C or less and so that the outer diameter of the glass fiber at the outlet of the protective pipe is within a range of the target outer diameter of the glass fiber + 6 µm or less.
摘要翻译：本发明提供了一种用于制造光纤的方法和装置，其中使用便宜的惰性气体等和便宜的辅助装置来抑制玻璃纤维的直径的变化，从而降低了传输损耗的增加，并提供了使用该方法和装置制造的光纤。该装置配备有一个基座（13），光纤预制件（11）插入该基座中，并且设置在基座外部的加热器（15），以从外部加热基座，并通过拉伸玻璃纤维（12 ），同时光纤预制件被加热和熔化，并且通过将基座的下部的出口向外拉出纤维。使用含有50％以上的氩气或氮气的气体作为供给到基座的气体，并且在基座下方设置长度为Da（mm）的保护管（17），保护管具有热量在其上部具有长度为Db（mm）的绝热体（18）封闭的绝缘区域（17a）和在其下部没有被任何绝热体封闭的非绝热区域（17b），以及设置使得保护管出口处的玻璃纤维的温度变为1700℃以下，使保护管出口处的玻璃纤维的外径在目标外径的范围内玻璃纤维+6μm以下。

2. 发明授权

EP2727888B1 FURNACE FOR GLASS BASE MATERIAL 有权
标题翻译：烤箱基本材料的玻璃
公开(公告)号：EP2727888B1
公开(公告)日：2016-08-24
申请号：EP12804672.9
申请日：2012-06-13
申请人： Sumitomo Electric Industries, Ltd.
发明人： ENOMOTO, Tadashi , OKAZAKI, Iwao , YAMAZAKI, Takashi , HAYAKAWA, Masatoshi
IPC分类号： C03B37/027 , H05B3/62 , C03B37/012 , F27B17/00 , C03B37/029
CPC分类号： C03B37/029 , C03B37/01257 , C03B2205/63 , F27B17/00 , H05B3/62 , H05B2203/025

3. 发明公开

EP4098633A1 COATING CONDITION DETECTION METHOD, COATING CONDITION DETECTION DEVICE, AND OPTICAL FIBER MANUFACTURING METHOD 审中-实审
公开(公告)号：EP4098633A1
公开(公告)日：2022-12-07
申请号：EP21747081.4
申请日：2021-01-29
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： ENOMOTO, Tadashi , SAITO, Takahiro
IPC分类号： C03C25/104 , C03C25/6226 , G01M11/00 , G02B6/44
摘要： This coating condition detection method according to one embodiment uses a simple device structure to detect the coating condition of a resin layer of a coated fiber. Under the coating condition detection method, an imaging optical system including a reflection mirror having a guide hole through which the optical fiber passes is prepared, and the imaging optical system is disposed so as to cause an object plane conjugate with an imaging plane to intersect the optical fiber that has passed through the reflection mirror and forms an image of light released from the optical fiber on the imaging plane to detect intensity of light at each point on the imaging plane with the intensity of light associated with information on a corresponding position on the object plane.

4. 发明授权

EP2803643B1 OPTICAL FIBER PRODUCTION METHOD AND OPTICAL FIBER 有权
标题翻译：光纤生产方法和光纤
公开(公告)号：EP2803643B1
公开(公告)日：2018-04-04
申请号：EP13736334.7
申请日：2013-01-09
申请人： Sumitomo Electric Industries, Ltd.
发明人： ENOMOTO, Tadashi , OKAZAKI, Iwao , YAMAZAKI, Takashi , HAYAKAWA, Masatoshi , SHIOZAKI, Manabu , UENOYAMA, Norihiro , FURUSYOU, Masaru
IPC分类号： C03B37/027 , C03B37/029 , C03B37/025 , G02B6/00
CPC分类号： C03B37/029 , C03B37/0253 , C03B37/027 , C03B37/02727 , C03B2205/30 , C03B2205/40 , C03B2205/56 , C03B2205/63 , C03B2205/70 , C03B2205/92 , G02B6/10 , G02B2006/12166 , Y02P40/57
摘要： The present invention provides a method and an apparatus for producing an optical fiber in which the increase in transmission loss is reduced while the variation in the diameter of a glass fiber is suppressed using an inexpensive inert gas or the like and inexpensive auxiliary devices, and provides an optical fiber to be produced using the method and the apparatus. The apparatus is equipped with a susceptor (13) into which an optical fiber preform (11) is inserted and a heater (15) disposed outside the susceptor to heat the susceptor from the outside and produces an optical fiber by drawing a glass fiber (12) while the optical fiber preform is heated and melted and by drawing out the fiber through the outlet at the lower section of the susceptor to the outside. A gas containing 50% or more of argon or nitrogen is used as a gas to be supplied into the susceptor, and a protective pipe (17) with a length of Da (mm) is provided under the susceptor, the protective pipe having a heat insulating region (17a) enclosed with a heat insulator (18) with a length of Db (mm) at the upper section thereof and a non-heat insulating region (17b) not enclosed with any heat insulators at the lower section thereof, and settings are made so that the temperature of the glass fiber at the outlet of the protective pipe becomes 1700°C or less and so that the outer diameter of the glass fiber at the outlet of the protective pipe is within a range of the target outer diameter of the glass fiber + 6 µm or less.

5. 发明公开

EP4371952A1 METHOD FOR PRODUCING OPTICAL FIBER, AND OPTICAL FIBER 审中-实审
公开(公告)号：EP4371952A1
公开(公告)日：2024-05-22
申请号：EP22842081.6
申请日：2022-07-11
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： ISHIKAWA, Shinji , ENOMOTO, Tadashi , SAITO, Takahiro , HASEGAWA, Takemi
IPC分类号： C03B37/027 , C03C13/04 , G02B6/02
CPC分类号： C03B37/027 , C03C13/04 , G02B6/02
摘要： A method for producing an optical fiber includes heating and melting an optical fiber preform and drawing the optical fiber preform. In this method for producing an optical fiber, the optical fiber is formed to include a core, a surrounding cladding surrounding a periphery of the core, and an outer cladding surrounding the surrounding cladding. In the drawn optical fiber, a maximum compressive stress of at least 100 MPa or more is applied to an optical waveguide region including at least the core.

6. 发明公开

EP2727888A1 FURNACE FOR GLASS BASE MATERIAL 有权
标题翻译： OFENFÜREIN GLASBASISMATERIAL
公开(公告)号：EP2727888A1
公开(公告)日：2014-05-07
申请号：EP12804672.9
申请日：2012-06-13
申请人： Sumitomo Electric Industries, Ltd.
发明人： ENOMOTO, Tadashi , OKAZAKI, Iwao , YAMAZAKI, Takashi , HAYAKAWA, Masatoshi
IPC分类号： C03B37/027 , F27B1/09 , F27B9/36 , H05B3/62
CPC分类号： C03B37/029 , C03B37/01257 , C03B2205/63 , F27B17/00 , H05B3/62 , H05B2203/025
摘要： The present invention provides a glass preform heating furnace in which the occurrence of arching is suppressed. The glass preform heating furnace is equipped with a susceptor (3) to which a glass preform is supplied; a slit heater (4) in which slits (7) are cut in a cylindrical member enclosing the susceptor from the upper and lower ends of the cylindrical member alternately; an insulator enclosing the exterior of the slit heater; and a furnace body enclosing the whole, wherein, in the case that the space between the slit heater (4) and the susceptor or between the slit heater (4) and the conductive member closest to the slit heater is D, that the maximum value of the electric field in this space is E1, that the number of the slits in the slit heater is N, that the slit width of the slit heater is S, and that the maximum value of the electric field in the slit space is E2, the values of D, N and S are set so that E1 ≥ E2 is established.
摘要翻译：本发明提供了一种玻璃预制件加热炉，其中抑制拱起的发生。玻璃预制件加热炉配备有供应玻璃预制件的基座（3）; 狭缝加热器（4），其中切口（7）切割成圆柱形构件，所述圆柱形构件交替地从圆柱形构件的上端和下端围绕基座; 封闭狭缝加热器外部的绝缘体; 以及包围整体的炉体，其中，在狭缝加热器（4）和基座之间或狭缝加热器（4）与最靠近狭缝加热器的导电部件之间的空间为D的情况下，最大值在该空间中的电场的截面宽度为E1，狭缝加热器的狭缝数为N，狭缝加热器的狭缝宽度为S，狭缝空间的电场的最大值为E2，设D，N，S的值设定为E1‰¥E2。

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