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    Variable dispersion compensator and optical transmission system
    1.
    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，

    Optical multiplexer/demultiplexer and adjustment method thereof
    2.
    发明授权
    Optical multiplexer/demultiplexer and adjustment method thereof 有权
    光复用器/解复用器及其调整方法

    公开(公告)号：US06823106B2

    公开(公告)日：2004-11-23

    申请号：US10260404

    申请日：2002-10-01

    申请人： Michiko Takushima ,  Hiroshi Suganuma ,  Tomomi Sano ,  Masakazu Shigehara

    发明人： Michiko Takushima ,  Hiroshi Suganuma ,  Tomomi Sano ,  Masakazu Shigehara

    IPC分类号： G02B628

    CPC分类号： G02B6/29307 ,  G02B6/272 ,  G02B6/2773 ,  G02B6/2931 ,  G02B6/29313 ,  G02B6/2938 ,  G02B6/29395

    摘要： The present invention relates to an optical multiplexer/demultiplexer. In the multiplexer/demultiplexer, a first grating receives to diffract a multi-wavelength light signal from a first port into light signals with different wavelengths. A second grating diffracts these light signals towards second ports. The second grating is disposed parallel with the first grating. The second grating has the same grating interval and grating direction as the first grating. The light signals diffracted by the second grating travel parallel with each other. Therefore, the light signals can efficiently enter the second ports without sophisticated lens design and adjustment of the optical system.

    摘要翻译： 本发明涉及一种光复用器/解复用器。 在多路复用器/解复用器中，第一光栅接收将来自第一端口的多波长光信号衍射成具有不同波长的光信号。 第二光栅将这些光信号衍射到第二端口。 第二光栅与第一光栅平行设置。 第二光栅具有与第一光栅相同的光栅间隔和光栅方向。 由第二光栅衍射的光信号彼此平行行进。 因此，光信号可以有效地进入第二端口，而无需光学系统的复杂的透镜设计和调整。

    Diffraction grating device
    4.
    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 fiber diffraction grating, a method of fabricating thereof and a laser light source
    7.
    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。

    Optical signal processor and optical signal processing method
    8.
    发明申请
    Optical signal processor and optical signal processing method 有权
    光信号处理器和光信号处理方法

    公开(公告)号：US20050238285A1

    公开(公告)日：2005-10-27

    申请号：US11106706

    申请日：2005-04-15

    申请人： Michiko Takushima ,  Tomomi Sano ,  Osamu Shimakawa ,  Tatsuhiko Tanaka ,  Masakazu Shigehara

    发明人： Michiko Takushima ,  Tomomi Sano ,  Osamu Shimakawa ,  Tatsuhiko Tanaka ,  Masakazu Shigehara

    IPC分类号： G02B6/28 ,  G02B6/34

    CPC分类号： G02B6/29311 ,  G02B6/29313 ,  G02B6/29394 ,  G02B6/29395 ,  G02B6/4215

    摘要： To provide an optical signal processor which can perform favorable optical signal processing even when there are environmental changes and the like. An optical signal processor 1 inputs light emitted from an end face of an optical fiber 11, subjects the inputted light to processing according to its wavelength, and outputs the processed light so as to make it incident on the end face of the optical fiber 11; and comprises optical systems 111 to 113, a diffraction grating device 120, reflecting mirrors 131 to 133, an optical path turning part 140, and a monitor part 150. The optical path turning part 140 transmits therethrough a part of the incident light and reflects at least a part of the remnant. The optical system 113 monitors the light transmitted through the optical path turning part 140.

    摘要翻译： 即使在存在环境变化等的情况下，也能够进行良好的光信号处理的光信号处理装置。 光信号处理器1输入从光纤11的端面发射的光，使输入的光根据其波长进行处理，并输出经处理的光，使其入射到光纤11的端面; 并且包括光学系统111至113，衍射光栅装置120，反射镜131至133，光路转向部分140和监视器部分150.光路转动部分140透过其中的一部分入射光并在 至少一部分残余物。 光学系统113监视透过光路转向部140的光。

    Optical signal processor and optical signal processing method for processing optical signals in optical communications systems
    9.
    发明授权
    Optical signal processor and optical signal processing method for processing optical signals in optical communications systems 有权
    光信号处理器和光信号处理方法，用于处理光通信系统中的光信号

    公开(公告)号：US07521660B2

    公开(公告)日：2009-04-21

    申请号：US11106706

    申请日：2005-04-15

    申请人： Michiko Takushima ,  Tomomi Sano ,  Osamu Shimakawa ,  Tatsuhiko Tanaka ,  Masakazu Shigehara

    发明人： Michiko Takushima ,  Tomomi Sano ,  Osamu Shimakawa ,  Tatsuhiko Tanaka ,  Masakazu Shigehara

    IPC分类号： H01J40/14

    CPC分类号： G02B6/29311 ,  G02B6/29313 ,  G02B6/29394 ,  G02B6/29395 ,  G02B6/4215

    摘要： The present invention relates to an optical signal processor which can perform favorable optical signal processing even when there are environmental changes and the like. The optical signal processor inputs light emitted from an end face of an optical fiber, subjects the inputted light to processing according to its wavelength, and outputs the processed light so as to make it incident on the end face of the optical fiber; and comprises optical systems, a diffraction grating device, mirror reflectors, an optical path turning part, and a monitor part. The optical path turning part transmits therethrough a part of the incident light and reflects at least a part of the remnant. The optical system monitors the light transmitted through the optical path turning part.

    摘要翻译： 光信号处理器技术领域本发明涉及即使存在环境变化等也能够进行良好的光信号处理的光信号处理装置。 光信号处理器输入从光纤的端面发射的光，根据其波长对输入的光进行处理，并输出经处理的光，使其入射到光纤的端面; 并且包括光学系统，衍射光栅装置，反射镜，光路转向部分和监视器部分。 光路转向部件透过其中的一部分入射光并反射残留物的至少一部分。 光学系统监视透过光路转向部分的光。

    Optical filter having cascaded long-period gratings
    10.
    发明授权
    Optical filter having cascaded long-period gratings 失效
    具有级联长周期光栅的滤光器

    公开(公告)号：US06665472B2

    公开(公告)日：2003-12-16

    申请号：US09964839

    申请日：2001-09-28

    申请人： Michiko Takushima ,  Masakazu Shigehara ,  Hiroshi Suganuma

    发明人： Michiko Takushima ,  Masakazu Shigehara ,  Hiroshi Suganuma

    IPC分类号： G02B634

    CPC分类号： G02B6/0208 ,  G02B6/02095 ,  G02B6/29319

    摘要： An optical filter has a first long-period grating and a second long-period grating formed in a unitary optical fiber. A difference is not less than 100 nm between a wavelength at which optical coupling is maximum between core-mode light and cladding-mode light of a predetermined mode number in the first long-period grating and a wavelength at which optical coupling is maximum between core-mode light and cladding-mode light of the same mode number as the cladding-mode light of the predetermined mode number, in the second long-period grating. This optical filter can be constructed in compact size and can readily implement a desired transmission characteristic.

    摘要翻译： 滤光器具有形成在单一光纤中的第一长周期光栅和第二长周期光栅。 核心模式光与第一长周期光栅中的预定模数的包层模式光之间的光耦合最大的波长与核心之间的光耦合最大的波长的差别不小于100nm 在第二长周期光栅中具有与预定模数的包层模式光相同模数的模光和包层模光。 该滤光器可以构造成紧凑的尺寸并且可以容易地实现期望的传输特性。