公开(公告)号：US5303318A

公开(公告)日：1994-04-12

申请号：US967816

申请日：1992-10-27

申请人： Mitsuhiro Tateda ,  Masaharu Ohashi ,  Katsusuke Tajima ,  Kazuyuki Shiraki

发明人： Mitsuhiro Tateda ,  Masaharu Ohashi ,  Katsusuke Tajima ,  Kazuyuki Shiraki

IPC分类号： C03B37/014 ,  G02B6/02 ,  G02B6/036 ,  G02B6/16

CPC分类号： G02B6/03633 ,  C03B37/01446 ,  G02B6/02 ,  G02B6/02052 ,  C03B2201/12 ,  C03B2203/18 ,  C03B2203/22 ,  C03B2203/36 ,  G02B6/02276

摘要： A high-power acceptable optical fiber comprises a core and cladding provided on the outer peripheral surface of the core. The dopant concentrations in the core and cladding each change in the axial direction of the optical fiber. The core has a same relative refractive index profile in any cross section thereof taken in a direction perpendicular to the axial direction thereof. The relative refractive index profile is normalized by a maximum refractive index of the core.

摘要翻译： 高功率可接受的光纤包括设置在芯的外周表面上的芯和包层。 芯和包层中的掺杂剂浓度各自在光纤的轴向方向上变化。 芯在其垂直于其轴向方向的任何横截面上具有相同的相对折射率分布。 相对折射率分布通过芯的最大折射率归一化。

公开(公告)号：US4913521A

公开(公告)日：1990-04-03

申请号：US279022

申请日：1988-12-02

申请人： Katsusuke Tajima ,  Yutaka Sasaki ,  Masaharu Ohashi ,  Makoto Tsubokawa ,  Nobuo Kuwaki

发明人： Katsusuke Tajima ,  Yutaka Sasaki ,  Masaharu Ohashi ,  Makoto Tsubokawa ,  Nobuo Kuwaki

IPC分类号： G02B6/024 ,  G02B6/10

CPC分类号： G02B6/105 ,  G01L1/242

摘要： A single-polarization optical fiber comprising a core, an inner cladding surrounding the core, an outer cladding surrounding the inner cladding and at least one pair of stress-applying portions each of which are partially extended into both the inner and outer claddings and which are symmetrical about the axis of the core and having thermal expansion coefficient higher than those of both the inner and outer claddings. When the refractive index of the stress-applying portions is lower than that of the core and higher than that of the inner cladding and further not higher than that of the outer cladding, one of orthogonally polarized mode is cutoff and only one polarized mode can propagate in the optical fiber.

公开(公告)号：US07228040B2

公开(公告)日：2007-06-05

申请号：US10523460

申请日：2004-03-30

申请人： Kazuhide Nakajima ,  Katsusuke Tajima ,  Jian Zhou ,  Izumi Sankawa ,  Kazuo Hogari

发明人： Kazuhide Nakajima ,  Katsusuke Tajima ,  Jian Zhou ,  Izumi Sankawa ,  Kazuo Hogari

IPC分类号： G02B6/032 ,  G02B6/02

CPC分类号： G02B6/02333 ,  G02B6/02019 ,  G02B6/02366 ,  G02B6/0365

摘要： A single mode fiber is provided which is suitable for high-speed, large-capacity optical communication and for optical wiring. The single mode fiber has a first cladding region with a uniform refractive index, a core region with a refractive index higher than that of the first cladding region, and a second cladding region including at least four air hole regions placed in the first cladding region. Optimization can be achieved by making the distance from the center of the core region to the air hole regions equal to 2–4.5 times the core radius, and the air hole radius equal to or greater than 0.2 times the core radius. It is preferable the core radius be 3.7–4.8 μm, the relative index difference of the core region from the first cladding region be 0.3–0.55 %.

摘要翻译： 提供单模光纤，适用于高速，大容量光通信和光布线。 单模光纤具有均匀的折射率的第一包层区域，具有比第一包层区域的折射率高的纤芯区域，以及包括设置在第一包层区域中的至少四个气孔区域的第二包层区域。 可以通过使芯部区域的中心到气孔区域的距离等于芯半径的2-4.5倍，空气孔半径等于或大于核心半径的0.2倍来实现优化。 芯部半径优选为3.7〜4.8μm，芯部区域与第一包层区域的相对折射率差为0.3〜0.55％。

公开(公告)号：US20060045448A1

公开(公告)日：2006-03-02

申请号：US10523460

申请日：2004-03-30

申请人： Kazuhide Nakajima ,  Katsusuke Tajima ,  Jian Zhou ,  Izumi Sankawa ,  Kazuo Hogari

发明人： Kazuhide Nakajima ,  Katsusuke Tajima ,  Jian Zhou ,  Izumi Sankawa ,  Kazuo Hogari

IPC分类号： G02B6/032

CPC分类号： G02B6/02333 ,  G02B6/02019 ,  G02B6/02366 ,  G02B6/0365

摘要： A single mode fiber is provided which is suitable for high-speed, large-capacity optical communication and for optical wiring. The single mode fiber has a first cladding region with a uniform refractive index, a core region with a refractive index higher than that of the first cladding region, and a second cladding region including at least four air hole regions placed in the first cladding region. Optimization can be achieved by making the distance from the center of the core region to the air hole regions equal to 2-4.5 times the core radius, and the air hole radius equal to or greater than 0.2 times the core radius. It is preferable the core radius be 3.2-4.8 μm, the relative index difference of the core region from the first cladding region be 0.3-0.55%.

摘要翻译： 提供单模光纤，适用于高速，大容量光通信和光布线。 单模光纤具有均匀的折射率的第一包层区域，具有比第一包层区域的折射率高的纤芯区域，以及包括设置在第一包层区域中的至少四个气孔区域的第二包层区域。 可以通过使芯部区域的中心到气孔区域的距离等于芯半径的2-4.5倍，并且空气孔半径等于或大于核心半径的0.2倍来实现优化。 芯半径优选为3.2-4.8μm，芯区域与第一包层区域的相对折射率差为0.3-0.55％。