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1. 发明授权

US06785444B2 Optical fiber grating device 失效
标题翻译：光纤光栅装置
公开(公告)号：US06785444B2
公开(公告)日：2004-08-31
申请号：US10129276
申请日：2002-10-01
申请人： Shinji Ishikawa , Masakazu Shigehara , Michiko Takushima , Tadashi Enomoto
发明人： Shinji Ishikawa , Masakazu Shigehara , Michiko Takushima , Tadashi Enomoto
IPC分类号： G02B634
CPC分类号： G02B6/021 , G02B6/02095 , G02B6/03633
摘要： An optical fiber grating device 1 is a device in which a long period grating 14 is formed in a core region 11 of an optical fiber 10 consisting of the core region 11 having a refractive index n1 and an outside diameter 2a, a first cladding region 12 surrounding the core region 11 and having a refractive index n2 and an outside diameter 2b, and a second cladding region 13 surrounding the first cladding region 12 and having a refractive index n3 and an outside diameter 2c. There is a magnitude relation of n1>n2>n3 among the refractive index n1 of the core region 11, the refractive index n2 of the first cladding region 12, and the refractive index n3 of the second cladding region 13, a relative refractive index difference &Dgr;n2 of the first cladding region 12 to the second cladding region 13 is not less than 0.5%, and a thickness (c−b) of the second cladding region 13 with respect to a transmission loss peak wavelength &lgr; is in a range of not less than &lgr; nor more than 10&lgr;.
摘要翻译：光纤光栅装置1是在由具有折射率n1和外径2a的纤芯区域11构成的光纤10的芯部区域11中形成长周期光栅14的装置，第一包层区域12 围绕芯区域11并具有折射率n2和外径2b，以及围绕第一包层区域12并具有折射率n3和外径2c的第二包层区域13。在芯区域11的折射率n1，第一包层区域12的折射率n2和第二包层区域13的折射率n3之间存在n1> n2> n3的大小关系，相对折射率差第一包层区域12到第二包层区域13的Deltan2不小于0.5％，第二包层区域13相对于透射损耗峰值波长λ的厚度（cb）在不小于λ的范围内也不超过10lambda。

2. 发明授权

US06292607B1 Method for determining an aging condition for an optical waveguide grating and temperature sensor 有权
标题翻译：用于确定光波导光栅和温度传感器的老化条件的方法
公开(公告)号：US06292607B1
公开(公告)日：2001-09-18
申请号：US09343472
申请日：1999-06-30
申请人： Shinji Ishikawa , Toru Iwashima , Michiko Takushima (nee Harumoto) , Akira Inoue , Masakazu Shigehara
发明人： Shinji Ishikawa , Toru Iwashima , Michiko Takushima (nee Harumoto) , Akira Inoue , Masakazu Shigehara
IPC分类号： G02B634
CPC分类号： G02B6/02185
摘要： The present invention provides a method for determining a condition of aging for an optical waveguide grating. In this method, the aged deterioration curve of the optical waveguide grating is set as a form of C·t−&agr;, where t represents time, and &agr; and C represent parameters. Then, the condition of the aging is determined based on the aged deterioration curve.
摘要翻译：本发明提供了一种用于确定光波导光栅的老化状况的方法。在该方法中，将光波导光栅的老化劣化曲线设定为C.t-α的形式，其中t表示时间，α和C表示参数。然后，根据老化退化曲线确定老化条件。

3. 发明授权

US06487340B2 Optical fiber grating element, production method, and optical fiber filter 有权
标题翻译：光纤光栅元件，生产方法和光纤滤波器
公开(公告)号：US06487340B2
公开(公告)日：2002-11-26
申请号：US09903763
申请日：2001-07-13
申请人： Tadashi Enomoto , Shinji Ishikawa , Masakazu Shigehara , Michiko Takushima
发明人： Tadashi Enomoto , Shinji Ishikawa , Masakazu Shigehara , Michiko Takushima
IPC分类号： G02B634
CPC分类号： G02B6/02095 , G02B6/03633 , G02B6/03666 , G02B6/14 , G02B6/266
摘要： The present invention relates to an optical fiber grating element having structure enabling more precise design and fabrication, a production method thereof, and an optical fiber filter including the same. The optical fiber grating element according to the present invention comprises a multi-mode optical fiber having a first core region of a refractive index n1, a second core of a refractive index n2 provided on a periphery of the first core region, and a cladding region of a refractive index n3 provided on a periphery of the second core region, and having a cutoff wavelength regarding to LP02-mode light on the longer wavelength side than a wavelength band in use. A long-period grating for selectively coupling the fundamental LP01-mode light of a predetermined wavelength in the wavelength band I use to LP0m (m≧2)-mode light is provided in a predetermined region of the first core region.
摘要翻译：本发明涉及具有能够进行更精确的设计和制造的结构的光纤光栅元件及其制造方法以及包括该光纤光栅的光纤滤波器。根据本发明的光纤光栅元件包括具有折射率n1的第一纤芯区域和设置在第一纤芯区域周围的折射率n2的第二纤芯的多模光纤，以及包覆区域设置在第二纤芯区域的周围的折射率n3，并且在比使用的波长带更长的波长侧具有关于LP02模式光的截止波长。在第一核心区域的预定区域中提供用于将波长带I中使用的预定波长的基本LP01模式光选择性地耦合到LP0m（m> = 2）模式光的长周期光栅。

4. 发明授权

US06522810B2 Optical loss filter 有权
公开(公告)号：US06522810B2
公开(公告)日：2003-02-18
申请号：US09983392
申请日：2001-10-24
申请人： Michiko Takushima , Shinji Ishikawa , Masakazu Shigehara
发明人： Michiko Takushima , Shinji Ishikawa , Masakazu Shigehara
IPC分类号： G02B634
CPC分类号： G02B6/0208 , G02B6/02095
摘要： The optical loss filter according to the present invention is configured such that a first long-period grating and a second long-period grating are formed in cascade on a unitary optical fiber having a core region and a cladding region. A coating layer surrounding a part of the cladding region is provided between the first and second long-period gratings. The optical loss filter can be made smaller, and can easily realize a desirable loss characteristic.

5. 发明授权

US06788874B1 Optical component 失效
标题翻译：光学元件
公开(公告)号：US06788874B1
公开(公告)日：2004-09-07
申请号：US09570392
申请日：2000-05-12
申请人： Shinji Ishikawa , Masakazu Shigehara
发明人： Shinji Ishikawa , Masakazu Shigehara
IPC分类号： G02B600
CPC分类号： G02B6/0219 , G02B6/02033 , G02B6/02185 , G02B6/138
摘要： An optical component is an optical fiber grating element having a grating formed in the core region of an optical fiber, and a cladding region is made of silica glass. An optical material for the core region is ladder-type silicone resin, whose refractive index is set to a desired value by appropriately adjusting the mixing ratio between SiO and a functional group and the mixing ratio of a phenyl group to a methyl group. The optical component has a desired thermal expansion coefficient and desired temperature characteristics as a whole.
摘要翻译：光学部件是光纤光栅元件，其具有形成在光纤的纤芯区域中的光栅，并且包层区域由石英玻璃制成。用于核心区域的光学材料是梯形硅树脂，其通过适当地调节SiO和官能团之间的混合比和苯基与甲基的混合比，将折射率设定为期望值。光学部件整体上具有期望的热膨胀系数和期望的温度特性。

6. 发明授权

US06580854B1 Optical waveguide grating and method of making the same 失效
标题翻译：光波导光栅及其制作方法
公开(公告)号：US06580854B1
公开(公告)日：2003-06-17
申请号：US09615955
申请日：2000-07-13
申请人： Tadashi Enomoto , Shinji Ishikawa , Masakazu Shigehara , Michiko Harumoto
发明人： Tadashi Enomoto , Shinji Ishikawa , Masakazu Shigehara , Michiko Harumoto
IPC分类号： G02B634
CPC分类号： G02B6/0219 , G02B6/02095 , G02B6/02142 , G02B6/02147
摘要： In an optical waveguide grating in an optical fiber having a cladding region around a core region, a periodic refractive index distribution is existed in a predetermined area of the core region along the optical axis. The core region has a composition of GeO2—P2O5—SiO2 based glass, for example, whereas the cladding region is made of SiO2, and the co-doping ratio in the core region is adjusted, so as to lower the temperature dependence of characteristics. The doping amount of P2O5 in the core region is preferably {fraction (1/15)} to 1 times, more preferably 0.6 to 1 times that of GeO2.
摘要翻译：在具有围绕芯区域的包层区域的光纤中的光波导光栅中，周期性折射率分布存在于沿着光轴的芯区域的预定区域中。核心区域例如具有GeO 2 -P 2 O 5 -SiO 2基玻璃的组成，而包层区域由SiO 2制成，并且调整芯部区域中的共掺杂比，以降低特性的温度依赖性。核心区域中的P2O5的掺杂量优选为GeO 2的1/15〜1倍，更优选为0.6〜1倍。

7. 发明授权

US6144784A Optical input/output module and light-reflecting device 失效
标题翻译：光输入/输出模块和光反射装置
公开(公告)号：US6144784A
公开(公告)日：2000-11-07
申请号：US209419
申请日：1998-12-11
申请人： Masakazu Shigehara , Shinji Ishikawa , Motoki Kakui , Hiroo Kanamori , Masayuki Nishimura
发明人： Masakazu Shigehara , Shinji Ishikawa , Motoki Kakui , Hiroo Kanamori , Masayuki Nishimura
IPC分类号： G02F1/31 , G02B6/293 , G02B6/34 , H04B10/27 , H04B10/29 , H04J14/00 , H04J14/02 , G02B6/28
CPC分类号： G02B6/2932 , G02B6/29383 , H04J14/0201
摘要： The present invention relates to an optical I/O module and light-reflecting device comprising a structure excellent in expandability having a high degree of freedom in designing. The optical I/O module according to the present invention comprises a directional coupler having, at least, input and output ports for constituting a part of a transmission line and an intermediate port for constituting a branch; and a light-reflecting device, optically connected to the intermediate port, for transmitting therethrough a specific wavelength. This structure can realize various configurations which allow a specific wavelength to be dropped from the transmission line and to be added to the transmission line, without influencing the configuration of the transmission line.
摘要翻译：本发明涉及一种光学I / O模块和光反射装置，其包括在设计中具有高自由度的可扩展性优异的结构。根据本发明的光I / O模块包括定向耦合器，至少具有用于构成传输线的一部分的输入和输出端口以及用于构成分支的中间端口; 以及光反射装置，光学连接到中间端口，用于透射特定波长。该结构可以实现允许特定波长从传输线路丢弃并被添加到传输线路的各种配置，而不影响传输线路的配置。

8. 发明授权

US07203399B2 Optical fiber and fiber grating type filter including the same 有权
标题翻译：光纤和光纤光栅类型的滤光片包括相同的
公开(公告)号：US07203399B2
公开(公告)日：2007-04-10
申请号：US10747085
申请日：2003-12-30
申请人： Shinji Ishikawa , Toshiki Taru , Masakazu Shigehara , Masaki Ohmura
发明人： Shinji Ishikawa , Toshiki Taru , Masakazu Shigehara , Masaki Ohmura
IPC分类号： G02B6/00
CPC分类号： G02B6/03694 , G02B6/02085 , G02B6/02119 , G02B6/03611
摘要： The present invention relates to an optical fiber having a structure which allows further improvements to be made both in terms of lower reflectance and narrower bandwidth, and to a fiber grating type filter including the optical fiber. The optical fiber applied to the fiber grating type filter comprises a core region extending along a predetermined axis, and a cladding region provided on an outer periphery of the core region. The core region does not contain any photosensitive dopant which contributes to predetermined wavelength light photosensitivity as a glass property, but a part of the cladding region contain such a photosensitive dopant. By means of this composition, it is possible to form a grating, which has a grating plane slanted by a predetermined angle with respect to the optical axis, in a part of the cladding region surrounding the core region.
摘要翻译：本发明涉及具有能够进一步改善低反射率和较窄带宽的结构的光纤以及包括该光纤的光纤光栅型滤光器。施加到光纤光栅型滤光器的光纤包括沿着预定轴线延伸的芯区域和设置在芯区域的外周上的包层区域。核心区域不含任何有助于作为玻璃性能的预定波长光敏性的光敏掺杂剂，但是包层区域的一部分含有这种光敏掺杂剂。通过这种组合，可以形成光栅，该光栅具有相对于光轴倾斜预定角度的光栅平面，该光栅平面围绕着核心区域的一部分包层区域。

9. 发明授权

US06842566B2 Optical fiber with built-in grating and optical fiber for forming grating therein 失效
标题翻译：具有内置光栅的光纤和用于在其中形成光栅的光纤
公开(公告)号：US06842566B2
公开(公告)日：2005-01-11
申请号：US10193733
申请日：2002-07-12
申请人： Shinji Ishikawa , Toshiki Taru , Masakazu Shigehara , Masaki Oomura
发明人： Shinji Ishikawa , Toshiki Taru , Masakazu Shigehara , Masaki Oomura
IPC分类号： G02B6/02 , G02B6/036 , G02B6/34
CPC分类号： G02B6/03666 , G02B6/021 , G02B6/02119 , G02B6/0365
摘要： The present invention provides an optical fiber equipped with a grating that functions as a narrow-band loss filter. The optical fiber has a core, an inner cladding, an intermediate cladding, and an outer cladding, which have refractive indexes n0, n1, n2, and n3, respectively, the refractive indexes having a relationship of n0>n3≧n1n2. At least a part of the inner cladding has a grating. The refractive index of the intermediate cladding is lower than the refractive indexes of the inner cladding and the outer cladding such that a recession is formed in the refractive index profile of the clad. The grating is provided on the inner side relative to the recession.
摘要翻译：本发明提供了配备有用作窄带损耗滤波器的光栅的光纤。光纤具有分别具有折射率n0，n1，n2和n3的折射率为n0> n3> = n1n2的芯，内包层，中间包层和外包层。内包层的至少一部分具有光栅。中间包层的折射率低于内包层和外包层的折射率，使得在包层的折射率分布中形成凹陷。光栅相对于经济衰退设置在内侧。

10. 发明授权

US06563984B1 Long-period grating device 有权
标题翻译：长周期光栅装置
公开(公告)号：US06563984B1
公开(公告)日：2003-05-13
申请号：US09504898
申请日：2000-02-16
申请人： Michiko Harumoto , Masakazu Shigehara , Shinji Ishikawa , Tadashi Enomoto
发明人： Michiko Harumoto , Masakazu Shigehara , Shinji Ishikawa , Tadashi Enomoto
IPC分类号： G02B626
CPC分类号： G02B6/02095
摘要： The present invention relates to a long-period grating device which eliminates only a desirable wavelength of core-mode light in a wavelength band in use from 1525 nm to 1610 nm. The long-period grating device according to the present invention comprises an optical fiber provided with a core region and a cladding region, whereas a long-period grating whose refractive index changes with a period &Lgr; in the advancing direction of light is provided in the core region, wherein the period &Lgr; is set such that the absolute value of a loss peak due to mode coupling concerning a refractive index modulation component with a period &Lgr;/(2n+1) (n=1, 2, 3, 4) is 0.2 dB or less in the wavelength band in use.
摘要翻译：本发明涉及一种长周期光栅器件，其仅消除了使用中的1525nm至1610nm的波长范围内的核心光的理想波长。根据本发明的长周期光栅装置包括设置有芯区域和包层区域的光纤，而在光的前进方向上折射率随周期LAMBD变化的长周期光栅设置在芯区域，其中周期LAMBD被设置为使得由于与周期LAMBD /（2n + 1）（n = 1,2,3,4）的折射率调制分量的模式耦合的损耗峰值的绝对值为0.2 dB或更小的波长带。

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