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    Optical waveguide grating and production method therefor
    1.
    发明授权
    Optical waveguide grating and production method therefor 失效
    光波导光栅及其制作方法

    公开(公告)号：US5949934A

    公开(公告)日：1999-09-07

    申请号：US823629

    申请日：1997-03-26

    申请人： Kensuke Shima ,  Michihiro Nakai ,  Hiroshi Hidaka ,  Kuniharu Himeno ,  Satoshi Okude ,  Akira Wada ,  Masaaki Sudoh ,  Tetsuya Sakai ,  Takuya Ienaka ,  Ryozo Yamauchi

    发明人： Kensuke Shima ,  Michihiro Nakai ,  Hiroshi Hidaka ,  Kuniharu Himeno ,  Satoshi Okude ,  Akira Wada ,  Masaaki Sudoh ,  Tetsuya Sakai ,  Takuya Ienaka ,  Ryozo Yamauchi

    IPC分类号： G02B6/124 ,  G02B6/34

    CPC分类号： G02B6/124 ,  G02B6/021 ,  G02B6/0218 ,  G02B6/0219

    摘要： An optical waveguide grating with radiative mode-coupling properties, with exceptional stability and reliability as an optical component, wherein the central wavelength of the rejection band has a low temperature dependence, due to the use of silica glass doped with germanium and boron for the core. The rejection bandwidth can be narrowed without increasing the grating length by forming the radiative mode-coupled optical waveguide grating in an optical waveguide wherein the mean relative refractive index difference of the core is greater than that of optical communication waveguides. The rejection can be increased by reducing the occurrence of cases wherein propagation modes of the core coupled to cladding modes once again couple to the core in palnar optical waveguide gratings formed by making periodic changes in the waveguide structure along the direction of propagation of light in an optical waveguide having a cladding with a lower refractive index than the core surrounding the core, by making the thickness of the cladding at least thirteen times the thickness of the core.

    摘要翻译： 具有辐射模耦合特性的光波导光栅作为光学部件具有出色的稳定性和可靠性，其中由于使用掺杂有锗和硼的石英玻璃作为芯，所以抑制带的中心波长具有低的温度依赖性 。 可以通过在光波导中形成辐射模耦合光波导光栅而不增加光栅长度来减小抑制带宽，其中芯的平均相对折射率差大于光通信波导的平均相对折射率差。 可以通过减少与耦合到包层模式的芯的传播模式再次耦合到palnar光波导光栅中的芯的情况的发生的情况下，可以增加抑制，其通过沿着光的传播方向周期性地改变波导结构而形成 光波导具有通过使包层的厚度至少为芯的厚度的十三倍而具有比围绕芯的芯的折射率低的折射率的包层。

    Method of making an optical waveguide grating with two dissimilar irradiating steps
    2.
    发明授权
    Method of making an optical waveguide grating with two dissimilar irradiating steps 失效
    制造具有两个不同辐射步骤的光波导光栅的方法

    公开(公告)号：US5996375A

    公开(公告)日：1999-12-07

    申请号：US837958

    申请日：1997-04-14

    申请人： Michihiro Nakai ,  Kensuke Shima ,  Hiroshi Hidaka ,  Satoshi Okude ,  Masaaki Sudoh ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

    发明人： Michihiro Nakai ,  Kensuke Shima ,  Hiroshi Hidaka ,  Satoshi Okude ,  Masaaki Sudoh ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

    IPC分类号： C03B37/10 ,  G02B5/18

    CPC分类号： G02B6/02142 ,  G02B6/02138 ,  G02B6/02152

    摘要： A method of producing an optical waveguide grating by exposure to light. An optical waveguide having a core composed of a material wherein the refractive index changes due to exposure to UV light is formed into an optical waveguide grating by applying a grating portion formation step wherein a grating portion is formed by irradiation with UV light at a predetermined spacing, and an overall exposure step after formation of the grating portion wherein the entire grating portion is irradiated with UV light. As a result, the effective refractive index of the grating portion is changed so as to allow the central wavelength to be adjusted without changing the rejection. Consequently, the grating properties can be precisely and easily controlled.

    摘要翻译： 一种通过曝光产生光波导光栅的方法。 具有由其中由于暴露于UV光而引起的折射率变化的材料的芯构成的光波导通过施加光栅部分形成步骤形成为光波导光栅，其中通过以预定间隔照射UV光形成光栅部分 ，并且在形成光栅部分之后的整体曝光步骤，其中整个光栅部分被UV光照射。 结果，改变了光栅部分的有效折射率，以便可以调节中心波长而不改变排斥。 因此，可以精确且容易地控制光栅特性。

    Optical fiber filter
    4.
    发明授权
    Optical fiber filter 失效
    光纤过滤器

    公开(公告)号：US5732170A

    公开(公告)日：1998-03-24

    申请号：US734709

    申请日：1996-10-21

    申请人： Satoshi Okude ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

    发明人： Satoshi Okude ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

    IPC分类号： G02B6/00 ,  G02B5/20 ,  G02B6/02 ,  G02B6/255 ,  G02B6/34 ,  G02B6/38 ,  G02B6/26

    CPC分类号： G02B6/29317 ,  G02B6/021 ,  G02B6/02209 ,  G02B6/2551 ,  G02B6/2552 ,  G02B6/2938 ,  G02B6/29332 ,  G02B6/3845

    摘要： The present invention relates to an optical fiber filter provided with a portion which selectively reflects or transmits light of a specific wavelength, this portion comprised of a multimode optical fiber in which the refractive index of the core changes periodically along the longitudinal direction thereof. Furthermore, this multimode optical fiber has an input end and an output end, with at least the input end of the multimode optical fiber being connected to a single mode optical fiber. As a result of forming an optical fiber filter in this way, it is possible to realize an optical fiber filter that exhibits no transmission loss at wavelengths other than the center wavelength.

    摘要翻译： 本发明涉及一种设置有选择性地反射或透射特定波长的光的部分的光纤滤波器，该部分包括其中芯的折射率沿其纵向方向周期性地变化的多模光纤。 此外，该多模光纤具有输入端和输出端，至少多模光纤的输入端连接到单模光纤。 作为这样形成光纤滤波器的结果，可以实现在中心波长以外的波长下不显示传输损耗的光纤滤波器。

    Optical fiber grating, optical fiber grating manufacturing method, and optical fiber grating manufacturing apparatus
    6.
    发明授权
    Optical fiber grating, optical fiber grating manufacturing method, and optical fiber grating manufacturing apparatus 失效
    光纤光栅，光纤光栅制造方法和光纤光栅制造装置

    公开(公告)号：US06819834B2

    公开(公告)日：2004-11-16

    申请号：US09929934

    申请日：2001-08-15

    申请人： Yuu Ishii ,  Michihiro Nakai ,  Satoshi Okude ,  Kenji Nishide ,  Kensuke Shima

    发明人： Yuu Ishii ,  Michihiro Nakai ,  Satoshi Okude ,  Kenji Nishide ,  Kensuke Shima

    IPC分类号： G02B634

    CPC分类号： G02B6/02185

    摘要： The invention provides a method and apparatus that precisely and efficiently improves the optical properties of an optical fiber grating. Preferably hydrogen loading processing, grating formation processing that forms a grating part by irradiation with ultraviolet light at a predetermined period, and preferably dehydrogenation, adjusting the optical properties by a suitable combination of uniform ultraviolet irradiation processing that irradiates the grating part as a whole with ultraviolet light and heat trimming processing, and finally heat aging is carried out.

    摘要翻译： 本发明提供了一种精确有效地改善光纤光栅的光学特性的方法和装置。 优选氢负载处理，通过在预定时间内用紫外线照射形成光栅部分的光栅形成处理，优选脱氢，通过将紫外线照射整体照射到紫外线的均匀紫外线照射处理的适当组合来调节光学性能 光和热修整加工，最后进行热老化。

    Slant short-period grating
    7.
    发明授权
    Slant short-period grating 失效
    斜长时间光栅

    公开(公告)号：US06836418B2

    公开(公告)日：2004-12-28

    申请号：US10311641

    申请日：2002-12-17

    申请人： Akira Sakamoto ,  Masaaki Sudo ,  Reiko Kojima ,  Tomosada Inada ,  Satoshi Okude ,  Kenji Nishide

    发明人： Akira Sakamoto ,  Masaaki Sudo ,  Reiko Kojima ,  Tomosada Inada ,  Satoshi Okude ,  Kenji Nishide

    IPC分类号： G02B634

    CPC分类号： G02B6/02119

    摘要： There is provided a slant short-period grating which is obtainable by irradiating light onto an optical fiber whose core is formed from quartz glass to which has been doped a photosensitive dopant that changes a refractive index of the quartz glass by light irradiation, and whose clad has one or two or more layers with at least the layer that is adjacent to the core being a photosensitive layer formed from quartz glass to which has been doped a photosensitive dopant that changes a refractive index of the quartz glass by light irradiation. In this slant short-period grating a grating portion is formed by changing the refractive index of the photosensitive layer of the clad and the core at a predetermined grating period along a longitudinal direction of the optical fiber by a predetermined slant angle. The diameter of the core is set to 5 &mgr;m or more, and the relative photosensitivity ratio of the core relative to the photosensitive layer of the clad that is adjacent to the core is designed so as to satisfy a predetermined formula. As a result, in the wavelength spectrum of transmitted light, loss peaks are obtained in a narrow frequency band.

    摘要翻译： 提供了一种倾斜的短周期光栅，其可以通过将光照射到其由已经掺杂有通过光照射改变石英玻璃的折射率的光敏掺杂剂的石英玻璃形成的光纤上而获得，并且其包层 具有一层或两层以上至少具有与芯相邻的层的层是由石英玻璃形成的感光层，已经掺杂有通过光照射改变石英玻璃的折射率的光敏掺杂剂。 在这种倾斜的短周期光栅中，光栅部分是通过以预定的倾斜角度沿光纤长度方向改变预定光栅周期的包层和芯的感光层的折射率来形成的。 将芯的直径设定为5μm以上，并且将芯相对于与芯相邻的包层的感光层的相对光敏度比设计为满足预定公式。 结果，在透射光的波长光谱中，在窄频带中获得损失峰值。

    Production device and production method for an optical device component having a grating structure
    8.
    发明授权
    Production device and production method for an optical device component having a grating structure 有权
    具有光栅结构的光器件部件的制造装置及其制造方法

    公开(公告)号：US08067755B2

    公开(公告)日：2011-11-29

    申请号：US11970817

    申请日：2008-01-08

    申请人： Akira Sakamoto ,  Satoshi Okude

    发明人： Akira Sakamoto ,  Satoshi Okude

    IPC分类号： G21G1/00

    CPC分类号： G02B6/02138

    摘要： A production device and a production method for a grating-type optical component enabling formation of a variety types of FBGs using a single phase mask and an optical component made by the production method or production device for a grating-type optical component are provided. The method involves diffusing at least one of hydrogen or deuterium into an optical fiber and altering the refractive index of the optical fiber by irradiating the fiber with non-interfering UV lamp light.

    摘要翻译： 提供了一种使用单相掩模形成各种FBG的光栅型光学部件的生产装置和制造方法，以及由光栅型光学部件的制造方法或制造装置制造的光学部件。 该方法包括将氢或氘中的至少一种扩散到光纤中，并通过用非干涉UV灯照射光纤来改变光纤的折射率。

    Optical fiber, slanted optical fiber grating, band rejection optical filter, gain equalizing optical filter for optical amplifier, and optical amplifier module
    10.
    发明授权
    Optical fiber, slanted optical fiber grating, band rejection optical filter, gain equalizing optical filter for optical amplifier, and optical amplifier module 有权
    光纤，倾斜光纤光栅，带阻光滤波器，光放大器的增益均衡滤光片和光放大器模块

    公开(公告)号：US06931185B2

    公开(公告)日：2005-08-16

    申请号：US10341135

    申请日：2003-01-13

    申请人： Masaaki Sudo ,  Atuhiko Niwa ,  Satoshi Okude

    发明人： Masaaki Sudo ,  Atuhiko Niwa ,  Satoshi Okude

    IPC分类号： G02B6/02 ,  G02B6/34 ,  G02F1/39 ,  G02B6/22

    CPC分类号： C03C3/06 ,  C03C13/00 ,  G02B6/0208 ,  G02B6/02119 ,  G02B6/0365 ,  G02B6/03694

    摘要： Photosensitivity of an inner core which is disposed in a central portion of a core is low. Photosensitivity of an outer core which is disposed close to a cladding is high. In the cladding, photosensitivity of the inner cladding which is close to the core is high and photosensitivity of an outer cladding which is outside of the inner cladding is low. A plurality of slant optical fiber grating having different optical characteristics by using the optical fiber having such photosensitivity so as to form a gain equalizing optical filter. By doing this, it is possible to provide an optical filter having a slant optical fiber grating which can maintain a filtering characteristics in a narrow bandwidth and enlarge loss area.

    摘要翻译： 设置在芯的中心部分的内芯的光敏性低。 靠近包层设置的外芯的感光度高。 在包层中，靠近芯的内包层的光敏性高，并且在内包层外侧的外包层的光敏性低。 通过使用具有这种光敏性的光纤来形成具有不同光学特性的多个倾斜光纤光栅，以形成增益均衡滤光器。 通过这样做，可以提供一种具有倾斜光纤光栅的滤光器，其能够在窄带宽内保持滤光特性并扩大损耗面积。