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    • 21. 发明申请
    • Optical fiber
    • 光纤
    • US20060159410A1
    • 2006-07-20
    • US11262965
    • 2005-11-01
    • Tatsuhiko SaitoKenichiro TakahashiTetsutarou Katayama
    • Tatsuhiko SaitoKenichiro TakahashiTetsutarou Katayama
    • G02B6/032
    • G02B6/02347C03B37/0122C03B2203/14C03B2203/19C03B2203/20C03B2203/42G02B6/02214G02B6/02338G02B6/02357G02B6/02361G02B6/105
    • The present invention relates to an optical fiber having a configuration which enables utilization of nonlinear phenomena in the near-infrared region. The optical fiber is directed to a holey fiber having a core region extending along a predetermined axis and a cladding region with plural holes arranged along the core region. The plural holes are arranged to constitute plural layers about the core region in the cross-section orthogonal to the predetermined axis. The three holes constituting the first layer (the innermost layer) closest to the core region correspond to three vertexes from among the six vertexes of a regular hexagon and are placed such that the arrangement of the three holes has three-fold rotational symmetry. The optical fiber enables utilization of nonlinear phenomena in the near-infrared region, by properly adjusting the hole diameter d and the pitch L between adjacent holes from among the holes constituting a single layer.
    • 本发明涉及具有能够利用近红外区域的非线性现象的结构的光纤。 光纤被引导到具有沿着预定轴线延伸的芯区域的多孔纤维和沿着核心区域布置有多个孔的包层区域。 多个孔配置成在与规定轴正交的截面中围绕芯部区域构成多层。 构成最靠近芯部区域的第一层(最内层)的三个孔对应于正六边形的六个顶点中的三个顶点,并且被放置成使得三个孔的布置具有三重旋转对称性。 通过适当地调整构成单层的孔中的孔直径d和相邻孔之间的间距L,能够利用近红外区域的非线性现象。
    • 22. 发明授权
    • Field effect transistor formed in semiconductor region surrounded by
insulating film
    • 形成在由绝缘膜包围的半导体区域中的场效应晶体管
    • US5723895A
    • 1998-03-03
    • US724818
    • 1996-10-02
    • Kenichiro Takahashi
    • Kenichiro Takahashi
    • H01L21/265H01L21/762H01L21/8238H01L21/84H01L27/04H01L27/092H01L29/10H01L29/78H01L29/786H01L29/06
    • H01L29/7824H01L21/76264H01L21/84H01L29/1087H01L29/78624H01L21/76275H01L21/76286
    • A field effect semiconductor device includes a first semiconductor region of a first conductive type and a second semiconductor region of a second conductive type provided above the first semiconductor region. A dielectric film is interposed between the first semiconductor region and the second semiconductor region to surround the second semiconductor region and to have at least one opening portion for connecting the second semiconductor region to the first semiconductor region. A field effect transistor is provided, in which a source region is provided in a surface portion of the second semiconductor region and connected to a source electrode and a drain region is provided in the surface portion of the second semiconductor region and connected to a drain electrode. A gate electrode provided between the source region and the drain region to form a channel region. In this case, it is preferred that the drain region, the gate and the source region are provided apart from a portion vertically corresponding to the opening portion.
    • 场效应半导体器件包括设置在第一半导体区域上方的第一导电类型的第一半导体区域和第二导电类型的第二半导体区域。 电介质膜插入在第一半导体区域和第二半导体区域之间,以围绕第二半导体区域并且具有用于将第二半导体区域连接到第一半导体区域的至少一个开口部分。 提供一种场效应晶体管,其中在第二半导体区域的表面部分中提供源极区域并连接到源极电极,并且漏极区域设置在第二半导体区域的表面部分中并连接到漏电极 。 栅电极,设置在源区和漏区之间以形成沟道区。 在这种情况下,优选的是,漏极区域,栅极和源极区域与垂直于开口部分的部分分开设置。
    • 25. 发明授权
    • Optical fiber
    • 光纤
    • US07212717B2
    • 2007-05-01
    • US11262965
    • 2005-11-01
    • Tatsuhiko SaitoKenichiro TakahashiTetsutarou Katayama
    • Tatsuhiko SaitoKenichiro TakahashiTetsutarou Katayama
    • G02B6/02
    • G02B6/02347C03B37/0122C03B2203/14C03B2203/19C03B2203/20C03B2203/42G02B6/02214G02B6/02338G02B6/02357G02B6/02361G02B6/105
    • The present invention relates to an optical fiber having a configuration which enables utilization of nonlinear phenomena in the near-infrared region. The optical fiber is directed to a holey fiber having a core region extending along a predetermined axis and a cladding region with plural holes arranged along the core region. The plural holes are arranged to constitute plural layers about the core region in the cross-section orthogonal to the predetermined axis. The three holes constituting the first layer (the innermost layer) closest to the core region correspond to three vertexes from among the six vertexes of a regular hexagon and are placed such that the arrangement of the three holes has three-fold rotational symmetry. The optical fiber enables utilization of nonlinear phenomena in the near-infrared region, by properly adjusting the hole diameter d and the pitch L between adjacent holes from among the holes constituting a single layer.
    • 本发明涉及具有能够利用近红外区域的非线性现象的结构的光纤。 光纤被引导到具有沿着预定轴线延伸的芯区域的多孔纤维和沿着核心区域布置有多个孔的包层区域。 多个孔配置成在与规定轴正交的截面中围绕芯部区域构成多层。 构成最靠近芯部区域的第一层(最内层)的三个孔对应于正六边形的六个顶点中的三个顶点,并且被放置成使得三个孔的布置具有三重旋转对称性。 通过适当地调整构成单层的孔中的孔直径d和相邻孔之间的间距L,能够利用近红外区域的非线性现象。
    • 26. 发明授权
    • Optical device control apparatus and optical device control method
    • 光器件控制装置及光器件控制方法
    • US07110636B2
    • 2006-09-19
    • US10887301
    • 2004-07-09
    • Kenichiro TakahashiMasakazu ShigeharaMakoto Katayama
    • Kenichiro TakahashiMasakazu ShigeharaMakoto Katayama
    • G02B6/26G02B6/42
    • G02B6/3588G02B6/3512G02B6/3546G02B6/356
    • The inclination of a reflecting surface of a mirror is adjusted such that light outputted from an input optical fiber is reflected by the mirror so as to be fed into an output optical fiber. The normal direction of the reflecting surface of the mirror vibrates about a predetermined direction at a predetermined frequency. A part of the light propagating through the output optical fiber is taken out by a light-branching part, so as to be received by a photodiode, whereby an electric signal having a value corresponding to thus received quantity of light is outputted from a detection circuit. Whether or not the electric signal includes a component of the predetermined frequency or whether the component is strong or weak is detected, whereby whether or not there is optical coupling from the input optical fiber to the output optical fiber or the extent thereof is determined.
    • 调节反射镜的反射面的倾斜度,使得从输入光纤输出的光被反射镜反射,以便被馈送到输出光纤中。 反射镜的反射面的法线朝预定频率的规定方向振动。 通过输出光纤传播的光的一部分由光分支部分取出,以被光电二极管接收,从而从检测电路输出具有与所接收的光量对应的值的电信号 。 电信号是否包括预定频率的分量或是否检测到分量是强还是弱,从而确定是否存在从输入光纤到输出光纤的光耦合或其程度。