公开(公告)号：US07874725B2

公开(公告)日：2011-01-25

申请号：US12083689

申请日：2007-09-21

Applicant: Hidehiko Komeda ,  Tsuyoshi Igi ,  Yasushi Koyano ,  Fumiyoshi Ohkubo ,  Kazuaki Negishi

Inventor： Hidehiko Komeda ,  Tsuyoshi Igi ,  Yasushi Koyano ,  Fumiyoshi Ohkubo ,  Kazuaki Negishi

IPC: G01K11/00 ,  G01K1/00 ,  G01K15/00 ,  G01J5/00

CPC classification number: G01K11/32 ,  G01K2011/324

Abstract: An optical fiber temperature distribution measuring apparatus and a method for measuring optical fiber temperature distribution, provided with a light source for inputting a pulse light to an optical fiber to be measured, a signal detecting unit for detecting a received light intensity of a predetermined light included in a backscattering light generated by an input of the pulse light in the optical fiber to be measured, and a signal processing unit for calculating a value corresponding to a variation of the received light intensity due to a hydrogen molecular absorption of the optical fiber to be measured based on the received light intensity of the predetermined light, to compensate the received light intensity of the predetermined light corresponding to a temperature of the optical fiber to be measured based on the value.

Abstract translation: 一种光纤温度分布测量装置和一种测量光纤温度分布的方法，设置有用于向待测光纤输入脉冲光的光源，用于检测包括的预定光的接收光强度的信号检测单元 在由待测光纤中的脉冲光的输入产生的后向散射光中，以及信号处理单元，用于计算与由于光纤的氢分子吸收所引起的接收光强度的变化相对应的值 基于预定光的接收光强度来测量，以基于该值来补偿与待测光纤的温度相对应的预定光的接收光强度。

公开(公告)号：US20060263019A1

公开(公告)日：2006-11-23

申请号：US11413050

申请日：2006-04-28

Applicant: Kazuaki Negishi ,  Yasushi Koyano ,  Itaru Sakabe ,  Masahiko Matsui ,  Masashi Onishi ,  Tetsuya Nakanishi

Inventor： Kazuaki Negishi ,  Yasushi Koyano ,  Itaru Sakabe ,  Masahiko Matsui ,  Masashi Onishi ,  Tetsuya Nakanishi

IPC: G02B6/02

CPC classification number: G02B6/03688 ,  C03B37/01211 ,  C03B2201/12 ,  C03B2201/31 ,  G02B6/0288 ,  G02B6/03638 ,  Y02P40/57

Abstract: A core part of a multimode optical fiber including the core part and a cladding part has a structure composed of a plurality of concentric layers in which a refractive index is decreased stepwise from a first core layer as an innermost layer to a third core layer as an outermost layer. The structure having the plurality of layers is formed by adjusting a quantity of addition of fluorine to silica glass. Fluorine is added to the cladding part so that a refractive index is lower than that of the third core layer as the outermost layer of the core part.

Abstract translation: 包括芯部分和包层部分的多模光纤的核心部分具有由多个同心层构成的结构，其中折射率从第一芯层作为最内层逐渐减小到第三芯层，其中 最外层。 具有多个层的结构通过将氟的添加量调节到石英玻璃而形成。 将氟添加到包层部分，使得折射率低于作为芯部的最外层的第三芯层的折射率。

公开(公告)号：US06546180B1

公开(公告)日：2003-04-08

申请号：US09240690

申请日：1999-02-02

Applicant: Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi

Inventor： Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi

IPC: G02B600

CPC classification number: G02B6/4457 ,  G02B6/02261 ,  G02B6/02395 ,  G02B6/03627 ,  H01S3/06704

Abstract: After a wide-band DCF is wound around a bobbin to form an optical fiber coil 32, the latter is removed from the bobbin and placed into a bundle state (the state where the increase in transmission loss in the wavelength band of 1.55 &mgr;m caused by distortions in winding is reduced by 0.1 dB/km or more) released from distortions in winding. A resin 42 is used as a coil-tidying member so as to secure the optical fiber coil 32 to a storage case 40 at four positions. Both ends of the optical fiber coil 32 are connected to pigtail fibers at fusion-splicing parts 44; respectively. Even when the storage case 40 is closed with a lid after the optical fiber coil 32 is secured to the storage case 40 with the resin 42, there remain interstices within the bundle of the optical fiber coil 32 and a space between the optical fiber coil 32 and the storage case 40. As a result, even when the optical fiber coil 32 in a bundle state is accommodated in the storage case 40, transmission loss and the like would not increase.

Abstract translation: 在宽带DCF缠绕在线轴上以形成光纤线圈32之后，将其从线轴上取下并放置成捆状态（由1.55μm的波长带的传输损耗的增加引起的状态 绕组失真减少了0.1 dB / km以上）。 树脂42用作线圈整理构件，以将光纤线圈32固定在四个位置处的存储盒40上。 光纤线圈32的两端在熔接部44连接到尾纤; 分别。 即使当光纤线圈32用树脂42固定在存储盒40上之后，当用盖子封闭存储盒40时，在光纤线圈32的束内仍然有空隙，并且光纤线圈32之间的空间 结果，即使束状态的光纤线圈32被容纳在收容箱40中，传输损耗等也不会增加。

公开(公告)号：US07043131B2

公开(公告)日：2006-05-09

申请号：US10217433

申请日：2002-08-14

Applicant: Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi ,  Kenji Tamano ,  Takashi Fujii

Inventor： Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi ,  Kenji Tamano ,  Takashi Fujii

IPC: G02B6/00

CPC classification number: G02B6/4457 ,  G02B6/02214 ,  G02B6/02261 ,  G02B6/02395 ,  G02B6/03627 ,  Y10T428/2933

Abstract: After a wide-band DCF is wound around a bobbin to form an optical fiber coil 32, the latter is removed from the bobbin and placed into a bundle state (the state where the increase in transmission loss in the wavelength band of 1.55 μm caused by distortions in winding is reduced by 0.1 dB/km or more) released from distortions in winding. A resin 42 is used as a coil-tidying member so as to secure the optical fiber coil 32 to a storage case 40 at four positions. Both ends of the optical fiber coil 32 are connected to pigtail fibers at fusion-splicing parts 44, respectively. Even when the storage case 40 is closed with a lid after the optical fiber coil 32 is secured to the storage case 40 with the resin 42, there remain interstices within the bundle of the optical fiber coil 32 and a space between the optical fiber coil 32 and the storage case 40. As a result, even when the optical fiber coil 32 in a bundle state is accommodated in the storage case 40, transmission loss and the like would not increase.

公开(公告)号：US06650821B1

公开(公告)日：2003-11-18

申请号：US09477561

申请日：2000-01-04

Applicant: Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi ,  Kenji Tamano ,  Takashi Fujii

Inventor： Yasushi Koyano ,  Eisuke Sasaoka ,  Shigeru Tanaka ,  Kohei Kobayashi ,  Masashi Onishi ,  Kenji Tamano ,  Takashi Fujii

IPC: G02B600

CPC classification number: G02B6/4457 ,  G02B6/02214 ,  G02B6/02261 ,  G02B6/02395 ,  G02B6/03627 ,  Y10T428/2933

Abstract: After a wide-band DCF is wound around a bobbin to form an optical fiber coil 32, the latter is removed from the bobbin and placed into a bundle state (the state where the increase in transmission loss in the wavelength band of 1.55 &mgr;m caused by distortions in winding is reduced by 0.1 dB/km or more) released from distortions in winding. A resin 42 is used as a coil-tidying member so as to secure the optical fiber coil 32 to a storage case 40 at four positions. Both ends of the optical fiber coil 32 are connected to pigtail fibers at fusion-splicing parts 44, respectively. Even when the storage case 40 is closed with a lid after the optical fiber coil 32 is secured to the storage case 40 with the resin 42, there remain interstices within the bundle of the optical fiber coil 32 and a space between the optical fiber coil 32 and the storage case 40. As a result, even when the optical fiber coil 32 in a bundle state is accommodated in the storage case 40, transmission loss and the like would not increase.

Abstract translation: 在宽带DCF缠绕在线轴上以形成光纤线圈32之后，将其从线轴上取下并放置成捆状态（由1.55μm的波长带的传输损耗的增加引起的状态 绕组失真减少了0.1 dB / km以上）。 树脂42用作线圈整理构件，以将光纤线圈32固定在四个位置处的存储盒40上。 光纤线圈32的两端分别在熔接部分44处连接到尾纤。 即使当光纤线圈32用树脂42固定在存储盒40上之后，当用盖子封闭存储盒40时，在光纤线圈32的束内仍然有空隙，并且光纤线圈32之间的空间 结果，即使束状态的光纤线圈32被容纳在收容箱40中，传输损耗等也不会增加。

公开(公告)号：US07773847B2

公开(公告)日：2010-08-10

申请号：US11413050

申请日：2006-04-28

Applicant: Kazuaki Negishi ,  Yasushi Koyano ,  Itaru Sakabe ,  Masahiko Matsui ,  Masashi Onishi ,  Tetsuya Nakanishi

Inventor： Kazuaki Negishi ,  Yasushi Koyano ,  Itaru Sakabe ,  Masahiko Matsui ,  Masashi Onishi ,  Tetsuya Nakanishi

IPC: G02B6/036

CPC classification number: G02B6/03688 ,  C03B37/01211 ,  C03B2201/12 ,  C03B2201/31 ,  G02B6/0288 ,  G02B6/03638 ,  Y02P40/57

Abstract: A core part of a multimode optical fiber including the core part and a cladding part has a structure composed of a plurality of concentric layers in which a refractive index is decreased stepwise from a first core layer as an innermost layer to a third core layer as an outermost layer. The structure having the plurality of layers is formed by adjusting a quantity of addition of fluorine to silica glass. Fluorine is added to the cladding part so that a refractive index is lower than that of the third core layer as the outermost layer of the core part.

Abstract translation: 包括芯部分和包层部分的多模光纤的核心部分具有由多个同心层构成的结构，其中折射率从第一芯层作为最内层逐渐减小到第三芯层，其中 最外层。 具有多个层的结构通过将氟的添加量调节到石英玻璃而形成。 将氟添加到包层部分，使得折射率低于作为芯部的最外层的第三芯层的折射率。

公开(公告)号：US20060018610A1

公开(公告)日：2006-01-26

申请号：US10961222

申请日：2004-10-12

Applicant: Yasushi Koyano ,  Hiroyoshi Yamamoto ,  Yasuhiro Naganuma

Inventor： Yasushi Koyano ,  Hiroyoshi Yamamoto ,  Yasuhiro Naganuma

IPC: G02B6/44

CPC classification number: G02B6/02247 ,  G02B6/4479

Abstract: The present invention relates to an optical fiber product suitable for fabricating an optical cable that requires a complicated length adjustment. The optical fiber product includes an effective use portion used as the optical cable, surplus portions connected to both ends of the effective use portion, and a distinguishing structure clearly indicating boundary portions between the effective use portion and the surplus portions. With the above structure, the surplus portions that become finally unnecessary are surely cut off in a fabrication step of the optical cable, thus enabling collect use of only effective use portion as the optical cable.

Abstract translation: 本发明涉及一种适用于制造需要复杂长度调节的光缆的光纤产品。 光纤产品包括用作光缆的有效使用部分，连接到有效使用部分的两端的剩余部分，以及清楚地指示有效使用部分和剩余部分之间的边界部分的区别结构。 利用上述结构，在光缆的制造步骤中可靠地切断最终不必要的剩余部分，从而能够仅使用有效使用部分作为光缆。

公开(公告)号：US20090059996A1

公开(公告)日：2009-03-05

申请号：US12083689

申请日：2007-09-21

Applicant: Hidehiko Komeda ,  Tsuyoshi Igi ,  Yasushi Koyano ,  Fumiyoshi Ohkubo ,  Kazuaki Negishi

Inventor： Hidehiko Komeda ,  Tsuyoshi Igi ,  Yasushi Koyano ,  Fumiyoshi Ohkubo ,  Kazuaki Negishi

IPC: G01K11/12

CPC classification number: G01K11/32 ,  G01K2011/324

Abstract: An optical fiber temperature distribution measuring apparatus and a method for measuring optical fiber temperature distribution, provided with a light source for inputting a pulse light to an optical fiber to be measured, a signal detecting unit for detecting a received light intensity of a predetermined light included in a backscattering light generated by an input of the pulse light in the optical fiber to be measured, and a signal processing unit for calculating a value corresponding to a variation of the received light intensity due to a hydrogen molecular absorption of the optical fiber to be measured based on the received light intensity of the predetermined light, to compensate the received light intensity of the predetermined light corresponding to a temperature of the optical fiber to be measured based on the value.

Abstract translation: 一种光纤温度分布测量装置和一种测量光纤温度分布的方法，设置有用于向待测光纤输入脉冲光的光源，用于检测包括的预定光的接收光强度的信号检测单元 在由待测光纤中的脉冲光的输入产生的后向散射光中，以及信号处理单元，用于计算与由于光纤的氢分子吸收所引起的接收光强度的变化相对应的值 基于预定光的接收光强度来测量，以基于该值来补偿与待测光纤的温度相对应的预定光的接收光强度。

公开(公告)号：US07379646B2

公开(公告)日：2008-05-27

申请号：US10961222

申请日：2004-10-12

Applicant: Yasushi Koyano ,  Hiroyoshi Yamamoto ,  Yasuhiro Naganuma

Inventor： Yasushi Koyano ,  Hiroyoshi Yamamoto ,  Yasuhiro Naganuma

IPC: G02B6/00

CPC classification number: G02B6/02247 ,  G02B6/4479

Abstract: The present invention relates to an optical fiber product suitable for fabricating an optical cable that requires a complicated length adjustment. The optical fiber product includes an effective use portion used as the optical cable, surplus portions connected to both ends of the effective use portion, and a distinguishing structure clearly indicating boundary portions between the effective use portion and the surplus portions. With the above structure, the surplus portions that become finally unnecessary are surely cut off in a fabrication step of the optical cable, thus enabling collect use of only effective use portion as the optical cable.

Abstract translation: 本发明涉及一种适用于制造需要复杂长度调节的光缆的光纤产品。 光纤产品包括用作光缆的有效使用部分，连接到有效使用部分的两端的剩余部分，以及清楚地指示有效使用部分和剩余部分之间的边界部分的区别结构。 利用上述结构，在光缆的制造步骤中可靠地切断最终不必要的剩余部分，从而能够仅使用有效使用部分作为光缆。

公开(公告)号：USRE38086E1

公开(公告)日：2003-04-22

申请号：US09714615

申请日：2000-11-17

Applicant: Masashi Onishi ,  Hiroo Kanamori ,  Masayuki Nishimura ,  Tomonori Kashiwada ,  Yasushi Koyano

Inventor： Masashi Onishi ,  Hiroo Kanamori ,  Masayuki Nishimura ,  Tomonori Kashiwada ,  Yasushi Koyano

IPC: G02B616

CPC classification number: G02B6/02261 ,  C03B37/014 ,  C03B2203/22 ,  C03B2203/36 ,  G02B6/02004 ,  G02B6/0228 ,  G02B6/02285 ,  G02B6/0281 ,  G02B6/0283 ,  G02B6/0286 ,  G02B6/03611 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/29377 ,  H01S3/06729 ,  H01S3/302

Abstract: The present invention relates to a dispersion compensating fiber for improving a transmission system with it in total chromatic dispersion and dispersion slope in the 1.55 &mgr;m wavelength band. The dispersion compensating fiber according to the present invention is characterized by having the following characteristics for light in the 1.55 &mgr;m wavelength band: chromatic dispersion not less than −40 ps/km/nm and not more than 0 ps/km/nm; dispersion slope not less than −0.5 ps/km/nm2 and not more than −0.1 ps/km/nm2; transmission loss not more than 0.5 dB/km; polarization mode dispersion not more than 0.7 ps.km−½; mode field diameter not less than 4.5 &mgr;m and not more than 6.5 &mgr;m; cut-off wavelength not less than 0.7 &mgr;m and not more than 1.7 &mgr;m in the length of 2 m; and bending loss at the diameter of 20 mm, not more than 100 dB/m. The dispersion compensating fiber is optically connected with a dispersion shifted fiber as a compensated object at a ratio of appropriate lengths, which can improve the system including the dispersion compensating fiber in the total chromatic dispersion and dispersion slope of the system in the 1.55 &mgr;m band.

Abstract translation: 本发明涉及一种用于改善传输系统的色散补偿光纤在1.55μm波长带中的总色散和色散斜率。 根据本发明的色散补偿光纤的特征在于对于1.55μm波长带中的光具有以下特性：色散不小于-40ps / km / nm且不大于0ps / km / nm; 色散斜率不小于-0.5 ps / km / nm2，不大于-0.1 ps / km / nm2; 传输损耗不超过0.5 dB / km; 偏振模色散不大于0.7 ps.km-½; 模场直径不小于4.5μm，不大于6.5μm; 截止波长不小于0.7μm和不大于1.7μm，长度为2μm; 弯曲损耗为20mm，不大于100dB / m。 色散补偿光纤以适当长度的比率与作为补偿对象的色散位移光纤光学连接，这可以改善包括色散补偿光纤在1.55mum带中的系统的总色散和色散斜率的系统。