公开(公告)号：US06644870B2

公开(公告)日：2003-11-11

申请号：US10103134

申请日：2002-03-22

申请人： Noriko Iwata ,  Takatoshi Kato ,  Keiichiro Fukuda

发明人： Noriko Iwata ,  Takatoshi Kato ,  Keiichiro Fukuda

IPC分类号： G02B6255

CPC分类号： G02B6/2551 ,  G02B6/02004 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/2552 ,  G02B6/29377

摘要： The present invention relates to an optical fiber transmission line having a structure offering superior connection loss characteristics at the fusion-spliced position between optical fibers. This optical fiber transmission line has at least first and second optical fibers that are fusion-spliced. Each of these first and second optical fibers has a core region doped with 10 mol % or more of Ge and has a mode field diameter with a minimum value of 7 &mgr;m or less at the wavelength of 1550 nm. The difference between the minimum mode diameter of the first optical fiber and that of the second optical fiber is 1 &mgr;m or less.

摘要翻译： 本发明涉及一种具有在光纤之间的熔接位置提供优异的连接损耗特性的结构的光纤传输线。 该光纤传输线至少具有熔接的第一和第二光纤。 这些第一和第二光纤中的每一个具有掺杂有10mol％以上的Ge的芯区域，并且在1550nm的波长下具有最小值为7μm或更小的模场直径。 第一光纤的最小模式直径与第二光纤的最小模式直径的差为1um或更小。

公开(公告)号：US06597846B1

公开(公告)日：2003-07-22

申请号：US09831308

申请日：2001-05-08

申请人： Takashi Fujii ,  Toshifumi Hosoya ,  Kenji Tamano ,  Keiichiro Fukuda ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi

发明人： Takashi Fujii ,  Toshifumi Hosoya ,  Kenji Tamano ,  Keiichiro Fukuda ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi

IPC分类号： G02B602

CPC分类号： G02B6/02395 ,  G02B6/02261 ,  G02B6/03627 ,  G02B6/4432 ,  G02B6/4457

摘要： An optical fiber (1) which does not readily suffer influences of side pressures and can realize superior transmission characteristics, having a glass part (2, 3) having a core (2) and at least one cladding (3) and at least one covering layer (4a, 4b) formed around the glass part (2, 3), characterized in that the Young's modulus at 23° C. of the covering layer (4) without the glass part (2, 3) is not greater than 400 MPa. The Young's modulus measurement of the covering layer (4) is obtained by removing the glass part (2, 3) from the optical fiber (1) and putting the covering layer (4) to a tensile test.

摘要翻译： 一种光纤（1），其不容易受到侧压的影响并且可以实现优异的传输特性，具有具有芯（2）和至少一个包层（3）的玻璃部分（2,3）和至少一个覆盖层 在玻璃部分（2,3）周围形成的层（4a，4b），其特征在于，没有玻璃部分（2,3）的覆盖层（4）在23℃下的杨氏模量不大于400MPa 。 通过从光纤（1）去除玻璃部分（2,3）并将覆盖层（4）进行拉伸试验来获得覆盖层（4）的杨氏模量测量。

公开(公告)号：US06608955B2

公开(公告)日：2003-08-19

申请号：US10052494

申请日：2002-01-23

申请人： Keiichiro Fukuda ,  Takemi Hasegawa ,  Masaharu Mogi

发明人： Keiichiro Fukuda ,  Takemi Hasegawa ,  Masaharu Mogi

IPC分类号： G02B602

CPC分类号： G02B6/02328 ,  C03C13/04 ,  G02B6/02333 ,  G02B6/02347 ,  G02B6/02361

摘要： An optical fiber has a core region and a cladding region surrounding the core region. The core region and the cladding region are made of a base material containing silica glass as a principal component. A plurality of holes extending along an axial direction are arranged at least in the cladding region. In the optical fiber, the base material has a hydroxyl mole fraction of not less than 10 ppm, or a fluorine content of not less than 0.2% by weight.

公开(公告)号：US06729777B2

公开(公告)日：2004-05-04

申请号：US10026445

申请日：2001-12-27

申请人： Takatoshi Kato ,  Tomonori Kashiwada ,  Keiichiro Fukuda ,  Noriko Iwata

发明人： Takatoshi Kato ,  Tomonori Kashiwada ,  Keiichiro Fukuda ,  Noriko Iwata

IPC分类号： G02B6255

CPC分类号： G02B6/2551 ,  G02B6/02242 ,  G02B6/02261 ,  G02B6/03644

摘要： A method of splicing optical fibers is provided to reduce the splicing loss of the first and second optical fibers having different MFDs from each other. In a pre-fusion heating step, the MFD at the adjacent end face of the optical fiber having larger MFD is enlarged by heating a portion including the adjacent end face thereof so as to diffuse a dopant. After the pre-fusion heating step, fusion-splicing of the first and the second optical fibers is performed. Thereafter, during the post-fusion heating step, the dopant is diffused by heating a portion including the fusion-spliced part between the first and the second optical fibers.

摘要翻译： 提供了一种拼接光纤的方法，以减少具有不同MFD的第一和第二光纤的拼接损耗。 在预融合加热步骤中，通过加热包含其相邻端面的部分以扩散掺杂剂，使具有较大MFD的光纤的相邻端面处的MFD扩大。 在预融合加热步骤之后，进行第一和第二光纤的熔接。 此后，在熔融后加热步骤期间，通过加热包括第一和第二光纤之间的熔接部分的部分来扩散掺杂剂。

公开(公告)号：US06628872B2

公开(公告)日：2003-09-30

申请号：US09804062

申请日：2001-03-13

申请人： Mitsuomi Hada ,  Kohei Kobayashi ,  Kenji Tamano ,  Keiichiro Fukuda ,  Masashi Onishi

发明人： Mitsuomi Hada ,  Kohei Kobayashi ,  Kenji Tamano ,  Keiichiro Fukuda ,  Masashi Onishi

IPC分类号： G02B602

CPC分类号： G02B6/29376 ,  H04B10/2525

摘要： There is disclosed a dispersion compensator for compensating for a chromatic dispersion and dispersion slope of an optical fiber transmission line, the dispersion compensator comprising a plurality of dispersion-compensating optical fibers connected to each other, the dispersion-compensating optical fibers each having a dispersion slope compensation ratio of at least 60% with respect to the optical fiber transmission line at a predetermined wavelength, one of said plurality of dispersion-compensating optical fibers having a dispersion slope compensation ratio of at least 80%, another of said plurality of dispersion-compensating optical fibers having a dispersion slope compensation ratio within the range of 60% to 100%.

摘要翻译： 公开了一种用于补偿光纤传输线的色散和色散斜率的色散补偿器，色散补偿器包括彼此连接的多个色散补偿光纤，色散补偿光纤各自具有色散斜率 补偿比相对于预定波长的光纤传输线至少为60％，所述多个色散补偿光纤中的一个具有至少80％的色散斜率补偿比，所述多个色散补偿中的另一个 具有在60％至100％范围内的色散斜率补偿比的光纤。