公开(公告)号：US20090084141A1

公开(公告)日：2009-04-02

申请号：US12327993

申请日：2008-12-04

申请人： Tomohiro Nunome ,  Hiroshi Kutami ,  Manabu Saitou ,  Kenji Okada ,  Munehisa Fujimaki ,  Koichi Harada

发明人： Tomohiro Nunome ,  Hiroshi Kutami ,  Manabu Saitou ,  Kenji Okada ,  Munehisa Fujimaki ,  Koichi Harada

IPC分类号： C03B37/018

CPC分类号： C03B37/01413 ,  C03B37/02718 ,  C03B2201/04 ,  C03B2201/075 ,  C03B2205/56 ,  G02B6/03622 ,  Y02P40/57

摘要： An optical fiber is formed by performing vapor phase deposition of SiO2 on the outside of a glass rod comprising a core section and a first cladding section and drawing a glass preform which formed by a second cladding section. Also, a single mode optical fiber is manufactured so that the ratio of the diameter D of the first cladding section and the diameter d of the core section is in a range of 4.0 to 4.8, and OH concentration is 0.1 ppm or less. Also, an optical fiber is manufactured so that a value of D/d>4.8, and the OH concentration is 0. 1 ppm or less. It is thereby possible to maintain an initial loss in the 1380 nm wavelength range even if hydrogen diffusion occurs.

摘要翻译： 通过在包括芯部和第一包层部分的玻璃棒的外部进行SiO 2的气相沉积并且拉制由第二包层部形成的玻璃预制件来形成光纤。 此外，制造单模光纤，使得第一包层部分的直径D和芯部分的直径d的比率在4.0至4.8的范围内，并且OH浓度为0.1ppm或更小。 此外，制造光纤，使得D / d> 4.8的值和OH浓度为0.1ppm以下。 因此即使发生氢扩散，也可以保持1380nm波长范围的初始损耗。

公开(公告)号：US20060115224A1

公开(公告)日：2006-06-01

申请号：US11287284

申请日：2005-11-28

申请人： Hiroshi Kutami ,  Shoichiro Matsuo ,  Kuniharu Himeno

发明人： Hiroshi Kutami ,  Shoichiro Matsuo ,  Kuniharu Himeno

IPC分类号： G02B6/02

CPC分类号： G02B6/0365 ,  G02B6/02

摘要： A single-mode optical fiber, cable, cord, and a method for ensuring a service life of the fiber are provided. The fiber has a core and a cladding, the fiber having a cut-off wavelength that exhibits a single-mode transmission in a 1.31 μm wavelength band. A relative refractive index difference of the core with respect to the cladding is adjusted such that a bending loss, when a bend is applied in a radius smaller than a limit bending radius of the fiber, becomes greater than a detection limit value. The limit bending radius is calculated from a relationship between a bending radius applied to the optical fiber and a failure probability which occurs after a time period. The method includes measuring a loss and ensuring that a failure probability of the fiber during a service life falls within a failure probability used for setting the limit bending radius.

摘要翻译： 提供单模光纤，电缆，电线以及确保光纤使用寿命的方法。 光纤具有芯和包层，光纤具有在1.31μm波长带中呈现单模传输的截止波长。 调整芯相对于包层的相对折射率差，使得当以小于光纤的极限弯曲半径的半径施加弯曲时的弯曲损耗变得大于检测极限值。 极限弯曲半径由施加到光纤的弯曲半径与时间之后发生的故障概率之间的关系计算。 该方法包括测量损耗并确保光纤在使用寿命期间的故障概率落在用于设置极限弯曲半径的故障概率内。

公开(公告)号：US07440663B2

公开(公告)日：2008-10-21

申请号：US11679001

申请日：2007-02-26

申请人： Shoichiro Matsuo ,  Hiroshi Kutami ,  Kuniharu Himeno ,  Hiroyuki Sawano

发明人： Shoichiro Matsuo ,  Hiroshi Kutami ,  Kuniharu Himeno ,  Hiroyuki Sawano

IPC分类号： G02B6/02

CPC分类号： G02B6/02266 ,  G02B6/02223 ,  G02B6/02242 ,  G02B6/03611 ,  G02B6/03644 ,  G02B6/0365 ,  G02B6/03672 ,  G02B6/03688

摘要： A single-mode optical fiber has a cut-off wavelength of 1260 nm or less, a zero-dispersion wavelength in the range of 1300 nm to 1324 nm, a zero-dispersion slope of 0.093 ps/nm2/km or less, a mode field diameter at a wavelength of 1310 nm in the range of 5.5 μm to 7.9 μm, and a bending loss of 0.5 dB or less at a wavelength of 1550 nm, the bending loss being produced when the fiber is wound around a 10-mm radius for 10 turns.

摘要翻译： 单模光纤的截止波长为1260nm以下，零色散波长为1300nm〜1324nm，零色散斜率为0.093ps / nm 2 / > / km以下，波长1310nm，5.5μm〜7.9μm范围的模场直径，波长1550nm的弯曲损耗为0.5dB以下，当纤维 围绕10毫米半径缠绕10圈。

公开(公告)号：US20070147756A1

公开(公告)日：2007-06-28

申请号：US11679001

申请日：2007-02-26

申请人： Shoichiro Matsuo ,  Hiroshi Kutami ,  Kuniharu Himeno ,  Hiroyuki Sawano

发明人： Shoichiro Matsuo ,  Hiroshi Kutami ,  Kuniharu Himeno ,  Hiroyuki Sawano

IPC分类号： G02B6/02

CPC分类号： G02B6/02266 ,  G02B6/02223 ,  G02B6/02242 ,  G02B6/03611 ,  G02B6/03644 ,  G02B6/0365 ,  G02B6/03672 ,  G02B6/03688

摘要： A single-mode optical fiber has a cut-off wavelength of 1260 nm or less, a zero-dispersion wavelength in the range of 1300 nm to 1324 nm, a zero-dispersion slope of 0.093 ps/nm2/km or less, a mode field diameter at a wavelength of 1310 nm in the range of 5.5 μm to 7.9 μm, and a bending loss of 0.5 dB or less at a wavelength of 1550 nm, the bending loss being produced when the fiber is wound around a 10-mm radius for 10 turns.

摘要翻译： 单模光纤的截止波长为1260nm以下，零色散波长为1300nm〜1324nm，零色散斜率为0.093ps / nm 2 / > / km以下，波长1310nm，5.5μm〜7.9μm范围的模场直径，波长1550nm的弯曲损耗为0.5dB以下，当纤维 围绕10毫米半径缠绕10圈。

公开(公告)号：US06694079B1

公开(公告)日：2004-02-17

申请号：US09787780

申请日：2001-03-21

申请人： Shoichiro Matsuo ,  Hiroshi Kutami ,  Shoji Tanigawa

发明人： Shoichiro Matsuo ,  Hiroshi Kutami ,  Shoji Tanigawa

IPC分类号： G02B622

CPC分类号： G02B6/0365 ,  G02B6/02014 ,  G02B6/02242 ,  G02B6/02257 ,  G02B6/02271 ,  G02B6/03611 ,  G02B6/03633

摘要： A dispersion-shifted optical fiber is obtained that has a refractive index distribution shape comprising a center core portion of high refractive index, a step core portion of lower refractive index than the center core portion, provided about the outer circumference thereof, and clad of lower refractive index than the step core portion, provided about the outer circumference of the step core, in which, by suitably setting structural parameters, both Aeff expansion and dispersion slope reduction are satisfactorily effected, simultaneously, under conditions that the optical fiber is substantially single-mode, and bending loss is held down to 100 dB/m or lower.

摘要翻译： 得到具有折射率分布形状的色散位移光纤，其折射率分布形状包括高折射率的中心纤芯部分，具有比中心纤芯部分低的折射率的阶梯形芯部分，围绕其外周设置，下部包层 通过适当地设定结构参数，可以令人满意地实现Aeff膨胀和色散斜率的减小，同时，在光纤基本上是单相的条件下， 模式，弯曲损耗保持在100dB / m以下。