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    Optical fiber diffraction grating, a method of fabricating thereof and a laser light source
    1.
    发明授权
    Optical fiber diffraction grating, a method of fabricating thereof and a laser light source 失效
    光纤衍射光栅，其制造方法和激光光源

    公开(公告)号：US6067392A

    公开(公告)日：2000-05-23

    申请号：US860697

    申请日：1997-06-16

    申请人： Toshinori Wakami ,  Masayuki Shigematsu ,  Yoshiaki Terasawa ,  Akira Inoue ,  Masakazu Shigehara ,  Toru Iwashima

    发明人： Toshinori Wakami ,  Masayuki Shigematsu ,  Yoshiaki Terasawa ,  Akira Inoue ,  Masakazu Shigehara ,  Toru Iwashima

    IPC分类号： G02B6/38 ,  H01S3/067 ,  G02B6/22

    CPC分类号： H01S3/0675 ,  G02B6/0218 ,  G02B6/0219 ,  G02B6/3845

    摘要： A diffraction grating portion (12) is formed in an optical fiber (10), having a diameter of 125 .mu.m and serving to transmit light, along its optical axis. The optical fiber is concentrically surrounded by a lower coating portion (14) having an outer diameter of 300 .mu.m and consisting of a silicone resin. The lower coating portion is concentrically surrounded by a coating portion (16) having an outer diameter of 900 .mu.m and consisting of a liquid crystal polymer, e.g., polyester amide. The coating portion is further surrounded by an outermost coating portion (18) having an outer diameter of 1 mm and consisting of a UV curing resin colored for identification. Both the optical fiber (10) and the lower coating portion (14) have positive thermal expansion coefficients. In contrast to this, the coating portion (16) consisting of the liquid crystal polymer has a negative thermal expansion coefficient.

    摘要翻译： PCT No.PCT / JP96 / 03000 Sec。 371日期：1997年6月16日 102（e）日期1996年6月16日PCT提交1996年10月16日PCT公布。 公开号WO97 / 14983 日期1997年04月24日衍射光栅部分（12）形成在光纤（10）中，其直径为125μm，用于沿其光轴透射光。 光纤由外部为300μm的下部涂层部分（14）同心围绕，由硅树脂构成。 下涂层部分由外径为900μm的涂层部分（16）同心地围绕，并由液晶聚合物例如聚酯酰胺组成。 涂层部分进一步被外径为1mm的最外涂层部分（18）包围，并由用于识别的紫外线固化树脂组成。 光纤（10）和下涂层部分（14）均具有正的热膨胀系数。 与此相反，由液晶聚合物构成的涂布部分（16）具有负的热膨胀系数。

    Variable dispersion compensator and optical transmission system
    4.
    发明授权
    Variable dispersion compensator and optical transmission system 有权
    可变色散补偿器和光传输系统

    公开(公告)号：US06892003B2

    公开(公告)日：2005-05-10

    申请号：US10114321

    申请日：2002-04-03

    申请人： Makoto Katayama ,  Toshiaki Okuno ,  Masayuki Nishimura ,  Tomomi Sano ,  Masakazu Shigehara ,  Hiroshi Suganuma ,  Toru Iwashima ,  Tomohiko Kanie

    发明人： Makoto Katayama ,  Toshiaki Okuno ,  Masayuki Nishimura ,  Tomomi Sano ,  Masakazu Shigehara ,  Hiroshi Suganuma ,  Toru Iwashima ,  Tomohiko Kanie

    IPC分类号： H04B10/18 ,  G02B6/26 ,  G02B6/35 ,  H04J14/02

    CPC分类号： H04B10/25133

    摘要： An optical signal, which is to become the subject of dispersion compensation, is split by optical combining/splitting unit 2, and each frequency component of the optical signal that is split is reflected by the corresponding reflective mirror 30 included in reflective mirror group 3 to apply a predetermined phase shift to the respective frequency components Each reflected frequency component is then combined using optical combining/splitting unit 2, to give dispersion compensated optical signal Furthermore, in regards to reflective mirror group 3, which is used to apply phase shift to each frequency component of an optical signal, each of the respective plurality of reflective mirrors 30 is made a movable mirror having a movable reflection position that reflects the frequency components. Through this, dispersion that develops in an optical signal may be compensated with favorable controllability and high accuracy. Therefore, the precision and controllability of dispersion compensation will become superior, and realized is a variable dispersion compensator having a miniaturized optical circuit, and an optical transmission system comprising such variable dispersion compensator,

    摘要翻译： 要成为色散补偿的对象的光信号被光学合成/分离单元2分离，并且被分离的光信号的每个频率分量被包括在反射镜组3中的相应的反射镜30反射到 对相应的频率分量施加预定的相移。然后使用光学合成/分离单元2组合每个反射频率分量，以产生色散补偿的光信号。此外，关于反射镜组3，其用于将相移施加到每个 光信号的频率分量，各个反射镜30中的每一个被制成具有反映频率分量的可移动反射位置的可移动反射镜。 由此，可以以良好的可控性和高精度补偿在光信号中产生的色散。 因此，色散补偿的精度和可控性将变得更好，并且实现了具有小型化光电路的可变色散补偿器和包括这种可变色散补偿器的光传输系统，

    Diffraction grating device
    5.
    发明授权
    Diffraction grating device 失效
    衍射光栅装置

    公开(公告)号：US06483955B2

    公开(公告)日：2002-11-19

    申请号：US09799354

    申请日：2001-03-06

    申请人： Manabu Shiozaki ,  Toru Iwashima ,  Masakazu Shigehara ,  Kiyotaka Murashima

    发明人： Manabu Shiozaki ,  Toru Iwashima ,  Masakazu Shigehara ,  Kiyotaka Murashima

    IPC分类号： G02F1295

    CPC分类号： G02B6/0208

    摘要： This invention relates to a diffraction grating device having a refractive index modulation formed in an optical waveguide region in a predetermined region in the longitudinal direction of the optical waveguide. In the diffraction grating device, a refractive index modulation is formed in the core region in a predetermined region in the longitudinal direction of the optical waveguide. In this diffraction grating device, the optical period of the refractive index modulation is substantially constant, the phase of the refractive index modulation is inverted at a phase inversion portion, and the number of phase inversion portions is one or two. In this diffraction grating device, the absolute value of a parameter R (equation (22a)) is smaller than 0.25. According to this invention, a diffraction grating device capable of shortening the region where the refractive index modulation is formed and flattening the reflectance characteristic in the reflection wavelength band is provided.

    摘要翻译： 本发明涉及一种衍射光栅装置，其具有在光波导的纵向方向上的预定区域中的光波导区域中形成的折射率调制。 在衍射光栅装置中，在光波导的长度方向的规定区域的芯部区域形成折射率调制。 在该衍射光栅装置中，折射率调制的光学周期基本上是恒定的，折射率调制的相位在相位反转部分反转，相位反转部分的数量是一个或两个。 在该衍射光栅装置中，参数R（式（22a））的绝对值小于0.25。 根据本发明，提供了能够缩短形成折射率调制区域并使反射波长带的反射特性变平的衍射光栅装置。

    Optical waveguide device and optical device having long-period grating
    6.
    发明授权
    Optical waveguide device and optical device having long-period grating 失效
    具有长周期光栅的光波导器件和光学器件

    公开(公告)号：US06317538B1

    公开(公告)日：2001-11-13

    申请号：US09206705

    申请日：1998-12-07

    申请人： Masakazu Shigehara ,  Masayuki Shigematsu ,  Motoki Kakui

    发明人： Masakazu Shigehara ,  Masayuki Shigematsu ,  Motoki Kakui

    IPC分类号： G02B634

    CPC分类号： G02B6/0218 ,  G02B6/0208 ,  G02B6/02095

    摘要： The present invention relates to an optical waveguide device having a plurality of long-period gratings, and an optical device equipped with the optical waveguide device. By providing a plurality of long-period gratings having loss wavelength characteristics different from each other, which fluctuate along with an environmental condition such as temperature or tension, within a core region of an optical waveguide device, the present invention enables the loss wavelength characteristic of the whole optical waveguide device to be regulated in response to the environmental change.

    摘要翻译： 本发明涉及具有多个长周期光栅的光波导器件，以及配备有该光波导器件的光学器件。 通过提供多个具有彼此不同的损耗波长特性的长周期光栅，其与光波导器件的芯区域内的环境条件如温度或张力一起波动，本发明能够实现波长特性的损失 整个光波导器件将根据环境变化进行调节。

    Laser light source and manufacturing method therefor
    7.
    发明授权
    Laser light source and manufacturing method therefor 失效
    激光光源及其制造方法

    公开(公告)号：US06415078B1

    公开(公告)日：2002-07-02

    申请号：US08633522

    申请日：1996-04-17

    申请人： Masakazu Shigehara ,  Masayuki Shigematsu ,  Takashi Kato

    发明人： Masakazu Shigehara ,  Masayuki Shigematsu ,  Takashi Kato

    IPC分类号： G02B634

    CPC分类号： G02B6/3861 ,  G02B6/02171 ,  G02B6/02209 ,  G02B6/3845 ,  G02B6/4203 ,  G02B6/4204 ,  G02B6/4207 ,  G02B6/4225 ,  G02B6/4237 ,  G02B6/4238 ,  H01S5/02284 ,  H01S5/147

    摘要： In a method of manufacturing a laser light source according to the present invention, an optical fiber having a diffraction grating is produced in which a plurality of refractive index changing portions are formed along the direction of an optical axis of the optical fiber. Then, the optical fiber having the diffraction grating is inserted into a ferrule, the optical fiber is bonded thereat, and the end surface of the ferrule is ground. Further, a laser oscillating device is prepared, and the laser oscillating device is coupled with the optical fiber having the diffraction grating and being inserted in the ferrule.

    摘要翻译： 在根据本发明的激光光源的制造方法中，制造了具有衍射光栅的光纤，其中沿着光纤的光轴方向形成有多个折射率变化部。 然后，将具有衍射光栅的光纤插入到套圈中，将光纤接合在其上，并且将套圈的端面研磨。 此外，制备激光振荡装置，并且激光振荡装置与具有衍射光栅的光纤耦合并插入到套圈中。

    Optical waveguide and process for producing it
    8.
    发明授权
    Optical waveguide and process for producing it 失效
    光波导及其制造方法

    公开(公告)号：US5790726A

    公开(公告)日：1998-08-04

    申请号：US789779

    申请日：1997-01-28

    申请人： Masumi Ito ,  Maki Inai ,  Akira Inoue ,  Masakazu Shigehara

    发明人： Masumi Ito ,  Maki Inai ,  Akira Inoue ,  Masakazu Shigehara

    IPC分类号： G02B6/124 ,  G02B6/34

    CPC分类号： G02B6/124 ,  G02B6/02119 ,  G02B6/02133 ,  G02B6/02138 ,  G02B6/021

    摘要： This invention provides an optical waveguide having diffraction gratings with sufficiently high reflectivity, a waveguide member for obtaining the optical waveguide, and a production process thereof. An optical waveguide in which desired diffraction gratings are formed in a core and in a cladding at a predetermined portion by using a waveguide member in which germanium dioxide is added in the core and in the cladding and irradiating the predetermined portion of the waveguide member with interference fringes of ultraviolet light. By this, the optical waveguide according to the present invention reflects guided light throughout the entire mode field region, thus having a high reflectivity.

    摘要翻译： 本发明提供一种具有足够高反射率的衍射光栅的光波导，用于获得光波导的波导部件及其制造方法。 一种光波导，其中通过使用其中在核心和包层中添加二氧化锗的波导部件在预定部分在芯部和包层中形成期望的衍射光栅，并且在干涉下照射波导部件的预定部分 紫外线条纹。 由此，根据本发明的光波导在整个模场区域反射引导光，因此具有高的反射率。

    Laser light source apparatus, OTDR apparatus, and optical communication line inspection system
    9.
    发明授权
    Laser light source apparatus, OTDR apparatus, and optical communication line inspection system 失效
    激光光源设备，OTDR仪器，光通信线路检测系统

    公开(公告)号：US5771250A

    公开(公告)日：1998-06-23

    申请号：US721326

    申请日：1996-09-26

    申请人： Masakazu Shigehara ,  Akira Inoue

    发明人： Masakazu Shigehara ,  Akira Inoue

    IPC分类号： G01M11/02 ,  G01M11/00 ,  G02B6/02 ,  G02B6/122 ,  H01S5/062 ,  H01S5/0683 ,  H01S5/12 ,  H01S5/14 ,  H01S3/30 ,  G02B6/34 ,  H04B10/08

    CPC分类号： G01M11/3145 ,  G01M11/3136 ,  H01S5/146 ,  H04B10/071 ,  H01S5/0622 ,  H01S5/0683 ,  H01S5/1206 ,  H01S5/1212 ,  H01S5/1215

    摘要： The pulse laser light source apparatus in the OTDR apparatus of present invention comprises an optical waveguide which receives and guides the light emitted from the first light-emitting end face, wherein the optical waveguide comprises a reflecting area which selectively reflects a part of light emitted from a light-emitting end face of a semiconductor light-emitting device, a core of the reflecting area comprises a first diffraction grating which is disposed in a first area and whose refractive index periodically changes along an optical-axis direction, the first diffraction grating selectively reflects, of the light emitted from the light-emitting end face of the semiconductor light-emitting device, a part of the light within a first wavelength range. And the diffraction grating is one of denvices which constitute a laser resonator.

    摘要翻译： 本发明的OTDR装置中的脉冲激光光源装置包括：光波导，其接收并引导从第一发光端面发出的光，其中，所述光波导包括反射区域，所述反射区域选择性地反射从 半导体发光装置的发光端面，反射区域的芯包括设置在第一区域中并且其折射率沿光轴方向周期性变化的第一衍射光栅，第一衍射光栅选择性地 从半导体发光器件的发光端面发射的光反射一部分光在第一波长范围内。 并且衍射光栅是构成激光谐振器的折叠之一。

    Optical waveguide and process for producing it
    10.
    发明授权
    Optical waveguide and process for producing it 失效
    光波导及其制造方法

    公开(公告)号：US5627933A

    公开(公告)日：1997-05-06

    申请号：US389828

    申请日：1995-02-16

    申请人： Masumi Ito ,  Maki Inai ,  Akira Inoue ,  Masakazu Shigehara

    发明人： Masumi Ito ,  Maki Inai ,  Akira Inoue ,  Masakazu Shigehara

    IPC分类号： G02B6/124 ,  G02B6/34 ,  G02B6/00

    CPC分类号： G02B6/124 ,  G02B6/02119 ,  G02B6/02133 ,  G02B6/02138 ,  G02B6/021

    摘要： This invention provides an optical waveguide having diffraction gratings with sufficiently high reflectivity, a waveguide member for obtaining the optical waveguide, and a production process thereof. An optical waveguide in which desired diffraction gratings are formed in a core and in a cladding at a predetermined portion by using a waveguide member in which germanium dioxide is added in the core and in the cladding and irradiating the predetermined portion of the waveguide member with interference fringes of ultraviolet light. By this, the optical waveguide according to the present invention reflects guided light throughout the entire mode field region, thus having a high reflectivity.

    摘要翻译： 本发明提供一种具有足够高反射率的衍射光栅的光波导，用于获得光波导的波导部件及其制造方法。 一种光波导，其中通过使用其中在核心和包层中添加二氧化锗的波导部件在预定部分在芯部和包层中形成期望的衍射光栅，并且在干涉下照射波导部件的预定部分 紫外线条纹。 由此，根据本发明的光波导在整个模场区域反射引导光，因此具有高的反射率。