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1. 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。

2. 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。

3. 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.

4. 发明申请

US20050238285A1 Optical signal processor and optical signal processing method 有权
标题翻译：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。

5. 发明授权

US06823106B2 Optical multiplexer/demultiplexer and adjustment method thereof 有权
标题翻译：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。

6. 发明授权

US06665472B2 Optical filter having cascaded long-period gratings 失效
标题翻译：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。

7. 发明授权

US06337937B1 Optical filter and method of making the same 失效
标题翻译：滤光片及其制作方法
公开(公告)号：US06337937B1
公开(公告)日：2002-01-08
申请号：US09313005
申请日：1999-05-17
申请人： Michiko Takushima , Masakazu Shigehara
发明人： Michiko Takushima , Masakazu Shigehara
IPC分类号： G02B626
CPC分类号： G02B6/02142 , G02B6/0208 , G02B6/02095
摘要： The present invention relates to an optical filter having a plurality of long-period gratings, and a method of making the same. The optical filter according to the present invention comprises a plurality of long-period gratings having attenuation peaks different from each other in a core region thereof, whereas the order of cladding mode in the light attenuated by the plurality of long-period gratings to couple with the core mode thereof varies among these long-period gratings.
摘要翻译：本发明涉及具有多个长周期光栅的滤光器及其制造方法。根据本发明的滤光器包括多个在其核心区域中具有彼此不同的衰减峰值的长周期光栅，而由多个长周期光栅衰减的光包层的顺序与其核心模式在这些长周期光栅之间变化。

8. 发明授权

US07521660B2 Optical signal processor and optical signal processing method for processing optical signals in optical communications systems 有权
标题翻译：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。

9. 发明授权

US06825981B2 Optical signal processor 有权
标题翻译：光信号处理器
公开(公告)号：US06825981B2
公开(公告)日：2004-11-30
申请号：US10682075
申请日：2003-10-10
申请人： Michiko Takushima , Tomomi Sano , Makoto Katayama , Masakazu Shigehara
发明人： Michiko Takushima , Tomomi Sano , Makoto Katayama , Masakazu Shigehara
IPC分类号： G02B2744
CPC分类号： G02B6/356 , G02B6/272 , G02B6/29311 , G02B6/29313 , G02B6/2938 , G02B6/3518 , G02B6/352 , G02B6/357
摘要： The present invention relates to an optical signal processor which can multiplex or demultiplex multiwavelength signal light. The optical signal processor includes an optical input/output capability, a first optical system, a wavelength branching capability, a second optical system, and a reflecting capability.
摘要翻译：本发明涉及一种能够对多波长信号光进行复用或解复用的光信号处理器。光信号处理器包括光输入/输出能力，第一光学系统，波长分支能力，第二光学系统和反射能力。

10. 发明申请

US20060045526A1 Optical communication system 审中-公开
标题翻译：光通信系统
公开(公告)号：US20060045526A1
公开(公告)日：2006-03-02
申请号：US11212910
申请日：2005-08-29
申请人： Makoto Katayama , Tomohiko Kanie , Michiko Takushima , Takayuki Shimazu , Akira Inoue , Hisao Maki , Masayuki Nishimura
发明人： Makoto Katayama , Tomohiko Kanie , Michiko Takushima , Takayuki Shimazu , Akira Inoue , Hisao Maki , Masayuki Nishimura
IPC分类号： H04J14/00
CPC分类号： H04J14/0282 , H04J14/0226 , H04J14/0232 , H04J14/0247 , H04J14/0252 , H04Q11/0067 , H04Q11/0071
摘要： The present invention relates to an optical communication system of a structure permitting the communication carrier side to select a delivery service content to be finally provided from a terminal in a communication network through an optical fiber to a subscriber home. The optical communication system comprises a terminal as a final repeater in a predetermined communication network for delivering signal light with multiple signal channels multiplexed, to a plurality of subscriber homes; and an optical fiber network with one or more branch points installed between the terminal and the subscriber homes. The terminal includes an optical multiplexer/demultiplexer for multiplexing multiple signal channels included in the signal light, and the branch point is provided with a wavelength selector for selecting at least one of the multiplexed signal channels in accordance with a delivery service content of each subscriber home included in a delivery target group of the terminal and for delivering it to the subscriber home.
摘要翻译：本发明涉及一种允许通信运营商侧通过光纤从用户家庭中选择最终从通信网络中的终端提供的传送服务内容的结构的光通信系统。光通信系统包括作为最终中继器的终端，在预定的通信网络中，用于将多个信号信道的信号光传送到多个用户家庭; 以及一个光纤网络，其中一个或多个分支点安装在终端和订户之间。终端包括用于复用包括在信号光中的多个信号信道的光复用器/解复用器，并且分支点设置有用于根据每个用户家庭的传送服务内容选择多路复用信号信道中的至少一个的波长选择器包括在终端的传送目标组中并将其传送到用户家庭。

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