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    Polarization-maintaining optical fiber and optical fiber gyro
    3.
    发明申请
    Polarization-maintaining optical fiber and optical fiber gyro 有权
    极化维护光纤和光纤陀螺

    公开(公告)号：US20070116417A1

    公开(公告)日：2007-05-24

    申请号：US11474416

    申请日：2006-06-26

    申请人： Kazuhiko Aikawa ,  Katsuaki Izoe ,  Kazuyuki Hayashi ,  Manabu Kudoh

    发明人： Kazuhiko Aikawa ,  Katsuaki Izoe ,  Kazuyuki Hayashi ,  Manabu Kudoh

    IPC分类号： G02B6/02

    CPC分类号： G01C19/722 ,  G02B6/24

    摘要： A polarization-maintaining optical fiber comprises: a core; a pair of stress-applying parts disposed one at each side of the core; and a cladding which surrounds the core and the stress-applying parts; wherein when the polarization-maintaining optical fiber is used at a wavelength of 0.81 μm to 0.87 μm, a cut-off wavelength measured with a fiber length of 2 m is longer than the wavelength used and polarization crosstalk when a fiber having a length of 1,000 m is wound on a reel having a diameter of 40 mm is equal to or less than −35 dB/100 m.

    摘要翻译： 偏振保持光纤包括：芯; 一对在所述芯的每一侧设置的应力施加部; 以及包围芯和应力部分的包层; 其中，当波长为0.81μm至0.87μm的偏振波保持光纤使用时，光纤长度为2μm的截止波长比所使用的波长长和长度为1000的光纤时的极化串扰 m卷绕在直径为40mm的卷轴上等于或小于-35dB /100μm。

    Polarization-maintaining optical fiber and optical fiber gyro
    4.
    发明授权
    Polarization-maintaining optical fiber and optical fiber gyro 有权
    极化维护光纤和光纤陀螺

    公开(公告)号：US07430353B2

    公开(公告)日：2008-09-30

    申请号：US11474416

    申请日：2006-06-26

    申请人： Kazuhiko Aikawa ,  Katsuaki Izoe ,  Kazuyuki Hayashi ,  Manabu Kudoh

    发明人： Kazuhiko Aikawa ,  Katsuaki Izoe ,  Kazuyuki Hayashi ,  Manabu Kudoh

    IPC分类号： G02B6/02

    CPC分类号： G01C19/722 ,  G02B6/24

    摘要： A polarization-maintaining optical fiber comprises: a core; a pair of stress-applying parts disposed one at each side of the core; and a cladding which surrounds the core and the stress-applying parts; wherein when the polarization-maintaining optical fiber is used at a wavelength of 0.81 μm to 0.87 μm, a cut-off wavelength measured with a fiber length of 2 m is longer than the wavelength used and polarization crosstalk when a fiber having a length of 1,000 m is wound on a reel having a diameter of 40 mm is equal to or less than −35 dB/100 m.

    摘要翻译： 偏振保持光纤包括：芯; 一对在所述芯的每一侧设置的应力施加部; 以及包围芯和应力部分的包层; 其中，当波长为0.81μm至0.87μm的偏振波保持光纤使用时，光纤长度为2μm的截止波长比所使用的波长长和长度为1000的光纤时的极化串扰 m卷绕在直径为40mm的卷轴上等于或小于-35dB /100μm。

    Hole-assisted holey fiber and low bending loss multimode holey fiber
    6.
    发明申请
    Hole-assisted holey fiber and low bending loss multimode holey fiber 有权
    孔辅助多孔纤维和低弯曲损耗多模多孔纤维

    公开(公告)号：US20060034574A1

    公开(公告)日：2006-02-16

    申请号：US11178477

    申请日：2005-07-12

    申请人： Ning Guan ,  Katsuhiro Takenaga ,  Katsuaki Izoe ,  Kazuhiko Aikawa ,  Kuniharu Himeno

    发明人： Ning Guan ,  Katsuhiro Takenaga ,  Katsuaki Izoe ,  Kazuhiko Aikawa ,  Kuniharu Himeno

    IPC分类号： G02B6/032

    CPC分类号： G02B6/02333 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/14

    摘要： A hole-assisted holey fiber is provided. The holey fiber includes a core region; a cladding region around the core region, and a plurality of holes in the cladding region around the core region. The core region has a higher refractive index than that of the cladding region. The holes form an inner hole layer and an outer hole layer, and the inner hole layer has the same number of holes as the number of the holes in the outer hole layer. The outer layer holes are provided in locations in which inner holes are absent when viewed from the center of the core region, and holes defining the same layer have the same diameter. A distance Λ1 from a center of the core region to a center of an inner hole and a distance Λ2 from the center of the core region to a center of an outer hole satisfy the relationship Λ1

    摘要翻译： 提供孔辅助多孔纤维。 多孔纤维包括芯区域; 围绕芯区域的包层区域，以及围绕芯区域的包层区域中的多个孔。 芯区域具有比包层区域更高的折射率。 孔形成内孔层和外孔层，内孔层的孔数与外孔层的孔数相同。 外层孔设置在从芯区域的中心观察时不存在内孔的位置，并且限定相同层的孔具有相同的直径。 从芯部区域的中心到内部孔的中心距离λ1到从芯部区域的中心到外部中心的距离λ2<2 < 孔的内径满足关系Lambda 1 N 2 N 2和内孔的直径d 1 N 2，直径d 2 < SUB>满足关系d <1> <= D 2 <2>。

    Hole-assisted holey fiber and low bending loss multimode holey fiber
    7.
    发明授权
    Hole-assisted holey fiber and low bending loss multimode holey fiber 有权
    孔辅助多孔纤维和低弯曲损耗多模多孔纤维

    公开(公告)号：US07292762B2

    公开(公告)日：2007-11-06

    申请号：US11178477

    申请日：2005-07-12

    申请人： Ning Guan ,  Katsuhiro Takenaga ,  Katsuaki Izoe ,  Kazuhiko Aikawa ,  Kuniharu Himeno

    发明人： Ning Guan ,  Katsuhiro Takenaga ,  Katsuaki Izoe ,  Kazuhiko Aikawa ,  Kuniharu Himeno

    IPC分类号： G02B6/032

    CPC分类号： G02B6/02333 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/14

    摘要： A hole-assisted holey fiber is provided. The holey fiber includes a core region; a cladding region around the core region, and a plurality of holes in the cladding region around the core region. The core region has a higher refractive index than that of the cladding region. The holes form an inner hole layer and an outer hole layer, and the inner hole layer has the same number of holes as the number of the holes in the outer hole layer. The outer layer holes are provided in locations in which inner holes are absent when viewed from the center of the core region, and holes defining the same layer have the same diameter. A distance Λ1 from a center of the core region to a center of an inner hole and a distance Λ2 from the center of the core region to a center of an outer hole satisfy the relationship Λ1

    摘要翻译： 提供孔辅助多孔纤维。 多孔纤维包括芯区域; 围绕芯区域的包层区域，以及围绕芯区域的包层区域中的多个孔。 芯区域具有比包层区域更高的折射率。 孔形成内孔层和外孔层，内孔层的孔数与外孔层的孔数相同。 外层孔设置在从芯区域的中心观察时不存在内孔的位置，并且限定相同层的孔具有相同的直径。 从芯部区域的中心到内部孔的中心距离λ1到从芯部区域的中心到外部中心的距离λ2<2 < 孔的内径满足关系Lambda 1 N 2 N 2和内孔的直径d 1 N 2，直径d 2 < SUB>满足关系d 1 > = d 2 2。

    Connection method and connecting structure for photonic crystal fiber
    8.
    发明授权
    Connection method and connecting structure for photonic crystal fiber 有权
    光子晶体光纤的连接方法和连接结构

    公开(公告)号：US07267495B2

    公开(公告)日：2007-09-11

    申请号：US11154731

    申请日：2005-06-17

    申请人： Ryuji Suzuki ,  Kazuhiko Aikawa ,  Kuniharu Himeno ,  Ning Guan

    发明人： Ryuji Suzuki ,  Kazuhiko Aikawa ,  Kuniharu Himeno ,  Ning Guan

    IPC分类号： G02B6/255

    CPC分类号： G02B6/2551 ,  G02B6/02347 ,  G02B6/02361

    摘要： A connection method for a photonic crystal fiber for connecting the photonic crystal fiber and a fiber to be connected, the photonic crystal fiber including a cladding region having a number of microholes and a core region having a same refractive index as that of the cladding region, includes the steps of: abutting respective end faces of the photonic crystal fiber and the fiber to be connected each other; after the abutting, performing a main discharge in which an abutted portion is heated by an electric discharge under a first condition; and after the main discharge, performing an additional discharge in which the connection portion is heated by an electric discharge at least once under a second condition to increase a splice strength.

    摘要翻译： 一种用于连接光子晶体光纤和待连接光纤的光子晶体光纤的连接方法，包括具有多个微孔的包层区域和具有与包层区域相同折射率的纤芯区域的光子晶体光纤， 包括以下步骤：将要连接的光子晶体光纤和光纤的各个端面邻接; 在抵接之后，在第一状态下进行通过放电加热抵接部的主放电; 并且在主放电之后，在第二条件下进行至少一次的放电使连接部分被加热的附加放电以增加接合强度。

    Optical fiber and optical transmission system
    9.
    发明授权
    Optical fiber and optical transmission system 有权
    光纤和光传输系统

    公开(公告)号：US07076139B1

    公开(公告)日：2006-07-11

    申请号：US09635109

    申请日：2000-08-09

    申请人： Kazuhiko Aikawa ,  Takashi Suzuki ,  Akira Wada ,  Ryozo Yamauchi ,  Takaaki Suzuki ,  Shoichiro Matsuo ,  Manabu Saitou

    发明人： Kazuhiko Aikawa ,  Takashi Suzuki ,  Akira Wada ,  Ryozo Yamauchi ,  Takaaki Suzuki ,  Shoichiro Matsuo ,  Manabu Saitou

    IPC分类号： G02B6/02

    CPC分类号： G02B6/03644 ,  G02B6/02019 ,  G02B6/02238 ,  G02B6/02261 ,  G02B6/02266 ,  G02B6/03627 ,  G02B6/29377 ,  G02B6/29394 ,  H04B10/2525

    摘要： An optical fiber is fabricated with a refractive index profile having a central core; a middle part provided around the outer periphery of the central core and having a lower refractive index than that of the central core; and a cladding provided around the periphery of the middle part and having a higher refractive index than the middle part and a lower refractive index than the central core. This optical fiber has an effective core area of 120 μm2 or more in an employed wavelength band selected from the range of 1.53˜1.63 μm, and has a cut-off wavelength that is capable of substantially single mode propagation in the aforementioned employed wavelength band. As a result, it is possible to construct an optical transmission system having excellent transmission characteristics in which nonlinearity is decreased.

    摘要翻译： 制造具有中心芯的折射率分布的光纤; 中间部分围绕中心芯的外周设置，折射率低于中心芯的折射率; 以及围绕中间部分的周边设置并且具有比中间部分更高的折射率和比中心芯部更低的折射率的包层。 该光纤在选自1.53〜1.63μm范围内的使用波长带中具有120m 2以上的有效核心面积，并且具有能够基本上单模的截止波长 在上述使用的波长带中的传播。 结果，可以构成具有优异的非线性降低的传输特性的光传输系统。