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21. 发明专利

JP2004077662A Dispersion compensating optical fiber 有权
标题翻译：散光补偿光纤
公开(公告)号：JP2004077662A
公开(公告)日：2004-03-11
申请号：JP2002235940
申请日：2002-08-13
申请人： Furukawa Electric Co Ltd:The , 古河電気工業株式会社
发明人： TAMURA JUNICHI , MORIHIRA HIDEYA , SHIMOTAKAHARA IWAO
IPC分类号： G02B6/036 , G02B6/22
摘要： PROBLEM TO BE SOLVED: To provide a dispersion compensating optical fiber which optimizes compensation of an NZDFS for use in a wavelength area of an L band (1565 to 1625nm). SOLUTION: The dispersion compensating optical fiber has characteristics as follows; a ratio of a dispersion/dispersion slope value of a dispersion compensation object optical fiber to that of the dispersion compensating optical fiber is ≥60%, and bend loss for bend with curvature of 20mm diameter is ≤2.0 dB/m, and dispersion is -140 to -40 ps/nm/km, and transmission loss in the range of 1565 to 1625nm is ≤1.0 dB/km. The dispersion compensating optical fiber is connected to the dispersion compensation object optical fiber like an NZDSF having 90 to 200nm dispersion/dispersion slope value for 1592nm wavelength and compensates dispersion of the dispersion compensation object optical fiber. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种色散补偿光纤，其优化用于L波段（1565至1625nm）的波长区域中的NZDFS的补偿。
解决方案：色散补偿光纤具有如下特征：色散补偿对象光纤的色散/色散斜率与色散补偿光纤的色散/色散斜率的比率为≥60％，曲率为20mm的弯曲弯曲损耗为≤2.0dB/ m，色散为 - 140〜40ps / nm / km，1565〜1625nm范围内的传输损耗为≤1.0dB/ km。色散补偿光纤像色散补偿对象光纤如1592nm波长的90〜200nm色散/色散斜率值的NZDSF连接，并补偿色散补偿对象光纤的色散。版权所有（C）2004，JPO

22. 发明专利

JP2004043201A Method of working tip of optical fiber preform 审中-公开
公开(公告)号：JP2004043201A
公开(公告)日：2004-02-12
申请号：JP2002199166
申请日：2002-07-08
申请人： Furukawa Electric Co Ltd:The , 古河電気工業株式会社
发明人： MORIHIRA HIDEYA , UEHARA MASAMITSU , KAMIYA TAMOTSU
IPC分类号： G02B6/00 , C03B37/027
CPC分类号： C03B37/02772 , C03B2205/47
摘要： PROBLEM TO BE SOLVED: To prevent that the shape of a welding surface becomes unstable, bubbles are left or a synthetic quartz tube is obliquely welded by well-crushing the synthetic quartz tube and a core rod in the initial stage of heating and melting. SOLUTION: In the manufacture of an optical fiber by heating and integrating the tip part of an optical fiber preform constituted of a core rod and the synthetic quartz pipe into which the core rod is inserted and next, drawing simultaneously with the heating and the integrating while reducing the pressure in gaps between the core rod and the synthetic quartz tube, the method of working the tip of the optical fiber preform is performed by providing a taper in the tip part of the synthetic quartz tube to be narrow and sealing the tip part, also providing a taper in the tip part of the core rod to be narrow and making the slope of the taper provided in the tip part of the core rod to bring the tip part of the core rod into contact with the tip part of the synthetic quartz tube more gentle than that of the taper provided in the tip part of the synthetic quartz tube. COPYRIGHT: (C)2004,JPO

23. 发明专利

JP2004043200A Method of supporting optical fiber preform 审中-公开
公开(公告)号：JP2004043200A
公开(公告)日：2004-02-12
申请号：JP2002199165
申请日：2002-07-08
申请人： Furukawa Electric Co Ltd:The , 古河電気工業株式会社
发明人： MORIHIRA HIDEYA , UEHARA MASAMITSU , KAMIYA TAMOTSU
IPC分类号： G02B6/00 , C03B37/012 , C03B37/027
CPC分类号： C03B37/02736 , C03B37/02754
摘要： PROBLEM TO BE SOLVED: To prevent the disorder of the flow of a gas caused by the rapid fluctuation of furnace pressure at a place where a supporting tube for a clad begins to enter into the furnace in drawing. SOLUTION: In the manufacture of the optical fiber by heating and fusing the tip part of an optical fiber preform constituted of a core rod and a synthetic quartz pipe into which the core rod is inserted and drawing the core rod and the synthetic quartz tube while integrating, the method of supporting the optical fiber preform is performed by inserting the core rod into the synthetic quartz tube provided with a supporting tube having an inside diameter larger than the inside diameter of the synthetic quartz tube in one end. The outside diameter of the supporting tube is equal to or smaller than the outside diameter of the synthetic quartz tube. COPYRIGHT: (C)2004,JPO

24. 发明专利

JP2004043198A Method of cleaning optical fiber preform 有权
标题翻译：清洁光纤预选方法
公开(公告)号：JP2004043198A
公开(公告)日：2004-02-12
申请号：JP2002199163
申请日：2002-07-08
申请人： Furukawa Electric Co Ltd:The , 古河電気工業株式会社
发明人： MORIHIRA HIDEYA , UEHARA MASAMITSU , KAMIYA TAMOTSU
IPC分类号： G02B6/00 , C03B37/014 , C03B37/027
CPC分类号： C03B37/01211 , C03B37/02754
摘要： PROBLEM TO BE SOLVED: To prevent defect from occurring when a quartz tube is formed into an optical fiber in a state that the hollow part of the quartz tube is contaminated by washing and cleaning. SOLUTION: In the manufacture of the optical fiber by heating and melting the tip part of an optical fiber preform constituted of a core rod and the synthetic quartz pipe into which the core rod is inserted and drawing the core rod and the synthetic quartz tube while integrating them, one or more processes for washing the outside surface of the synthetic quartz tube are provided. The method of washing the optical fiber preform is performed by sealing one end of the synthetic quartz tube and after welding a quarts made supporting tube to another end, plugging the quartz made supporting tube and washing. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了防止在石英管的中空部分被洗涤和清洁污染的状态下将石英管形成为光纤时发生缺陷。解决方案：在通过加热和熔化由芯棒和其中插入芯棒的合成石英管构成的光纤预制件的尖端部分来拉制芯棒和合成石英的制造中，同时集成它们，提供用于洗涤合成石英管的外表面的一个或多个工艺。洗涤光纤预制件的方法是通过将合成石英管的一端密封并将石英制成的支撑管焊接到另一端，堵塞石英制的支撑管和冲洗来进行。版权所有（C）2004，JPO

25. 发明专利

JP2003327440A Method for manufacturing preform for optical fiber 审中-公开
标题翻译：用于制造光纤预制件的方法
公开(公告)号：JP2003327440A
公开(公告)日：2003-11-19
申请号：JP2002134697
申请日：2002-05-09
申请人： Furukawa Electric Co Ltd:The , 古河電気工業株式会社
发明人： MORIHIRA HIDEYA , KAMIYA TAMOTSU
IPC分类号： G02B6/00 , C03B37/012
CPC分类号： C03B37/01211 , C03B37/01251 , C03B37/02754 , C03B2205/08 , C03B2205/47
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a preform for an optical fiber, by which the length of defective fiber generated for the time until the spinning operation is stabilized after the start of the spinning operation and the lost time for that time can be shortened when the preform is freshly set on a drawing device and the tip of the preform is melted and drawn so as to be spun into the fiber on the occasion of the manufacturing of the optical fiber. SOLUTION: The method for manufacturing the preform for the optical fiber includes two processes comprising, after forming a glass body having a core, inserting the glass body into a glass tube and unifying them by heating and is characterized in that before heating and unifying, at least one end of the glass tube is ground into a tapered form similar to the meniscus form formed at the time of drawing. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种用于制造光纤预制棒的方法，通过该方法，在旋转操作开始之后纺丝操作稳定之前产生的缺陷纤维的长度和用于当将预成型件新鲜地设置在拉丝装置上时，可以缩短该时间，并且在制造光纤的情况下，预成型件的前端被熔化和拉伸以便纺丝成纤维。解决方案：用于制造光纤预制棒的方法包括两种方法，包括：在形成具有芯体的玻璃体之后，将玻璃体插入玻璃管并通过加热使其均匀，其特征在于，在加热和统一，玻璃管的至少一端被研磨成类似于在拉制时形成的弯液面形状的锥形。版权所有（C）2004，JPO

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