公开(公告)号：US20090052848A1

公开(公告)日：2009-02-26

申请号：US12257462

申请日：2008-10-24

申请人： Iwao SHIMOTAKAHARA ,  Harumi Inaba ,  Ryuichi Sugizaki

发明人： Iwao SHIMOTAKAHARA ,  Harumi Inaba ,  Ryuichi Sugizaki

IPC分类号： G02B6/44 ,  G02B6/028

CPC分类号： G02B6/0288 ,  G02B6/14 ,  G02B6/43 ,  G02B6/4403

摘要： An optical fiber has a refractive index profile approximated by n(r)=n1[1−2(Δ1/100)(r/a)̂α]1/2 when 0

摘要翻译： 当0

公开(公告)号：US20080226241A1

公开(公告)日：2008-09-18

申请号：US12124598

申请日：2008-05-21

申请人： Ryuichi SUGIZAKI ,  Iwao SHIMOTAKAHARA ,  Harumi INABA ,  Takeshi YAGI

发明人： Ryuichi SUGIZAKI ,  Iwao SHIMOTAKAHARA ,  Harumi INABA ,  Takeshi YAGI

IPC分类号： G02B6/44 ,  G02B6/036

CPC分类号： G02B6/03644 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/43 ,  G02B6/4403 ,  G02B6/4436

摘要： An optical fiber, made of silica-based glass, comprising a core and a cladding. The optical fiber having a mode field diameter of 6.5 μm or larger at a wavelength of 1300 nm, transmitting light with a wavelength of 1250 nm in a single mode, and having a bending loss of 1 dB/turn or smaller at a wavelength of 1300 nm when the optical fiber is bent with a curvature radius of 1.5 mm.

摘要翻译： 由二氧化硅基玻璃制成的光纤，包括芯和包层。 具有在1300nm波长下的模场直径为6.5μm或更大的光纤在单一模式下传输波长为1250nm的光，并且在波长1300处具有1dB /转或更小的弯曲损耗 当光纤以曲率半径为1.5mm弯曲时，nm为nm。

公开(公告)号：US20100296786A1

公开(公告)日：2010-11-25

申请号：US12768095

申请日：2010-04-27

申请人： Iwao SHIMOTAKAHARA ,  Ryuichi Sugizaki ,  Takeshi Yagi

发明人： Iwao SHIMOTAKAHARA ,  Ryuichi Sugizaki ,  Takeshi Yagi

IPC分类号： G02B6/036

CPC分类号： G02B6/02347 ,  G02B6/02019

摘要： An optical fiber suitable for high-capacity transmission having a large effective core area, a low bending loss, and capable of single mode operation at 1550 nm is provided. The optical fiber 10 has an effective core area≧175 μm2 at 1550 nm, a bending loss≦10 dB/m at a bending diameter of 20 mm at 1550 nm, and a cut-off wavelength λc≦1550 nm. The optical fiber has a first core 11 at the center, which has a refractive index higher than that of the cladding 13; and a second core 12 around the first core 11, which has a refractive index lower than that of the cladding 13; a primary medium portion; and secondary medium portions, which have a refractive index lower than that of the primary medium portion and the secondary medium portions have a plurality of first secondary medium portions 15 around the first core 11 and a plurality of second secondary medium portions 16 around the first core 11 and outside of the first secondary medium portions 15.

摘要翻译： 提供了适合于具有大的有效核​​心区域，低弯曲损耗并且能够在1550nm下进行单模操作的大容量传输的光纤。 光纤10在1550nm具有≥175μm2的有效核心面积，弯曲损耗＆nlE;在1550nm处的弯曲直径为20mm时为10dB / m，截止波长λc＆nlE为1550nm。 该光纤具有中心处的第一芯11，折射率高于包层13的折射率; 以及围绕第一芯体11的折射率低于包层13的折射率的第二芯体12; 主介质部分; 并且具有比初级介质部分和次级介质部分的折射率低的折射率的第二介质部分具有围绕第一芯体11的多个第一次级介质部分15和围绕第一芯部的多个第二次级介质部分16 11和第一次级介质部分15的外部。

公开(公告)号：US20080285929A1

公开(公告)日：2008-11-20

申请号：US11868222

申请日：2007-10-05

申请人： Iwao SHIMOTAKAHARA

发明人： Iwao SHIMOTAKAHARA

IPC分类号： G02B6/02

CPC分类号： G02B6/03655

摘要： A tension-absorbing cladding layer is formed around a cladding layer, with a refractive index equal to that of a center core region or higher. The center core region has a relative refractive index difference of −0.1% to 0% with respect to a pure silica glass, a chlorine concentration of wt % to 0.10 wt %, and a fluorine concentration of 0.10 wt % to 0.30 wt %. The tension-absorbing cladding layer has a relative refractive index difference of 0% to 0.05% with respect to the pure silica glass and a chlorine concentration of 0.15 wt % or lower. A ratio of an outer diameter of the tension-absorbing cladding layer to an outer diameter of the cladding layer is 1.10 to 1.40.

摘要翻译： 在包层周围形成张力吸收包层，折射率等于或高于中心纤芯区域的折射率。 中心芯区域相对于纯二氧化硅玻璃的相对折射率差为-0.1％至0％，氯浓度为0.10重量％，氟浓度为0.10重量％至0.30重量％。 拉伸吸收性包层相对于纯二氧化硅玻璃的相对折射率差为0〜0.05％，氯浓度为0.15重量％以下。 吸收包层的外径与包层的外径的比为1.10〜1.40。