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1. 发明专利

JP2004347971A Array waveguide diffraction grating type optical multiplexing/demultiplexing circuit 有权
$Array waveguide diffraction grating type optical multiplexing/demultiplexing circuit$
公开(公告)号：JP2004347971A
公开(公告)日：2004-12-09
申请号：JP2003146457
申请日：2003-05-23
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , エヌティティエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： KITO TSUTOMU , INOUE YASUYUKI , HIBINO YOSHINORI , SUGITA AKIO , OMORI YASUJI , OKAMOTO KATSUNARI
IPC分类号： G02B6/12
摘要： PROBLEM TO BE SOLVED: To provide an optical multiplexing/demultiplexing circuit provided with a transmission wavelength range characteristic having broad band and excellent flatness. SOLUTION: In the array waveguide diffraction grating type optical multiplexing/demultiplexing circuit, a high order mode is easily generated without causing an increase in radiation loss and, thereby, the transmission wavelength range characteristic having broad band and excellent flatness can be obtained by arranging a tapered waveguide 107 having a core width of w specified by the following relation with respect to a propagation axis z of light on a junction part between an input waveguide 101 and a first slab waveguide: z=(1/A)ä(w/2)^γ-a^γ}, γ>2, wherein A and γ are form parameters, a is 1/2 of the core width of the input wavelength. COPYRIGHT: (C)2005,JPO&NCIPI

2. 发明专利

JP2004361660A Array waveguide type wavelength demultiplexer 审中-公开
公开(公告)号：JP2004361660A
公开(公告)日：2004-12-24
申请号：JP2003159962
申请日：2003-06-04
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , エヌティティエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： DOI YOSHIYUKI , OGAWA IKUO , KAMEI ARATA , KITAGAWA TAKESHI , OKAMOTO KATSUNARI , KATO KUNIHARU , HIDA YASUHIRO , SUGITA AKIO
IPC分类号： G02B6/42 , G02B6/12 , G02B6/122 , H01L31/0232
摘要： PROBLEM TO BE SOLVED: To provide an array waveguide type wavelength demultiplexer having a flat transmission band and low transmission loss. SOLUTION: The wavelength demultiplexer is constituted in such a manner that an input channel waveguide 13, an input slab waveguide 14 to spread the input light in the direction parallel to the waveguide, an array waveguide 15 comprising waveguides each having the length different by a specified length from that of the adjacent waveguide, and an output slab waveguide 16 to allow the light in the array waveguide to interfere are successively connected in series on a waveguide substrate 11. Each waveguide in the input channel waveguide 13 and in the array waveguide 15 consists of a single mode waveguide, while the waveguide of an output channel waveguide 20 consists of a multimode waveguide. Thus, the demultiplexing characteristics with a flat transmission band and low transmision loss can be obtained. COPYRIGHT: (C)2005,JPO&NCIPI

3. 发明专利

JP2004177973A Optical signal processor 有权
公开(公告)号：JP2004177973A
公开(公告)日：2004-06-24
申请号：JP2004004885
申请日：2004-01-13
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： SAIDA TAKASHI , OKAMOTO KATSUNARI , TAKIGUCHI KOICHI
IPC分类号： G02F1/01 , G02F2/00 , H04B10/27 , H04B10/29 , H04B10/291 , H04B10/556 , H04B10/00 , H04B10/02
摘要： PROBLEM TO BE SOLVED: To provide a technique permitting a high-speed processing of an optical signal for reading information such as an address from the optical signal.
SOLUTION: The optical signal processor includes, on a substrate, an input optical waveguide, an optical splitting means for splitting the light inputted to the input optical waveguide into N (integer equal to or more than 2), an array of N first optical delay waveguides connected to respective output ports of the optical splitting means and for providing different delay times, optical gate means respectively provided to the array of the first optical delay waveguides, an N input/N output optical switch into which the optical signals from the array of the first optical delay waveguides are inputted, an array of N second optical delay waveguides connected to respective output ports of the N input/N output optical switch and for providing different delay times, an optical multiplexing means for multiplexing the optical signals from the array of the second optical delay waveguides, and an output optical waveguide connected to an output port of the optical multiplexing means.
COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2003307638A Multi-mode interference optical coupler 有权
标题翻译：多模干涉光耦合器
公开(公告)号：JP2003307638A
公开(公告)日：2003-10-31
申请号：JP2003147969
申请日：2003-05-26
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： SAIDA TAKASHI , HIMENO AKIRA , OKUNO MASAYUKI , OKAMOTO KATSUNARI , KANEKO AKEMASA
IPC分类号： G02B6/122
摘要： PROBLEM TO BE SOLVED: To provide a multi-mode interference optical coupler of a non-equally branched type with a simple structure to make its layout easy. SOLUTION: An area (refractive index changing part) 15 which is nearly perpendicular to the travel direction of light, equal in width, and different in refractive index is provided at a position where the light intensity of an area 16 is converged and between areas 16 and 17 of a multi-mode optical waveguide 13 arranged between input optical waveguides 12a and 12b and output optical waveguides 14a and 14b and thus a Mach-Zehnder type interferometer or extended Mach-Zehnder interferometer is equivalently constituted to realize an arbitrary branching ratio. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供具有简单结构的非等分支型多模干涉光耦合器，使其布局容易。解决方案：在区域16的光强度会聚的位置处设置有几乎垂直于宽度相等且折射率不同的光的行进方向的区域（折射率变化部分）15，以及布置在输入光波导12a和12b以及输出光波导14a和14b之间的多模光波导13的区域16和17之间，因此马赫曾德尔型干涉仪或扩展的马赫 - 曾德干涉仪被等效地构成，以实现任意分支比。版权所有（C）2004，JPO

5. 发明专利

JP2003084324A Multimode waveguide 审中-公开
标题翻译：多模波形
公开(公告)号：JP2003084324A
公开(公告)日：2003-03-19
申请号：JP2001277085
申请日：2001-09-12
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： KATO MASAO , OKAMOTO KATSUNARI , KAMITOKU MASAKI
IPC分类号： G02B6/12 , G02F1/313 , G02F1/365
摘要： PROBLEM TO BE SOLVED: To provide a multimode waveguide of which effective operation length can be set sufficiently long and to provide an optical device which has a low operation threshold light intensity. SOLUTION: The multimode waveguide is constituted by using a material which varies in refractive index with the intensity of propagated light and equipped with a reflecting means which reflects the propagated light in the waveguide at parts of the signal light incidence-side end surface and signal light projection-side end surface of the multimode waveguide. Further, the multimode waveguide is equipped with a refractive index varying means for varying the refractive index of the constitution material of the waveguide. Furthermore, the multimode waveguide is equipped with a control light input part and a control light output part and the refractive index of the constitution material of the waveguide is varied according to the intensity of control light propagated in the waveguide.
摘要翻译：要解决的问题：提供一种可以有效操作长度足够长的多模波导，并提供具有低操作阈值光强度的光学装置。解决方案：多模波导通过使用折射率随传播光强度变化的材料构成，并且配备有反射装置，该反射装置在信号光入射侧端面的部分处反射波导中的传播光，并且信号光多模波导的投影侧端面。此外，多模波导配备有用于改变波导的构成材料的折射率的折射率变化装置。此外，多模波导配备有控制光输入部和控制光输出部，并且波导的构成材料的折射率根据在波导中传播的控制光的强度而变化。

6. 发明专利

JP2006030733A Optical waveguide and method for manufacturing optical waveguide 审中-公开
标题翻译：光波导和制造光波导的方法
公开(公告)号：JP2006030733A
公开(公告)日：2006-02-02
申请号：JP2004211211
申请日：2004-07-20
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： SAIDA TAKASHI , HIROTA YOSHINOBU , TAKAHASHI HIROSHI , OKAMOTO KATSUNARI
IPC分类号： G02B6/12 , G02B6/13
摘要： PROBLEM TO BE SOLVED: To realize an optical waveguide which generates SC (super continuum) light near visible light. SOLUTION: A light guide portion 12a of a quartz glass film 12 laid on a silicon substrate 11 functions to guide light. Holes 13 are formed in a position along the both sides of the light guide portion 12a. A vacancy 14 is formed in a part of the silicon substrate 11 opposing the bottom of the light guide portion 12a, and the vacancy 14 is connected to the holes 13. Consequently, the entire upper surface of the light guide portion 12a is surrounded by air, the entire lower surface is surrounded by air in the vacancy 14, and most of both side faces are surrounded by air in the holes 13. The light guide portion 12a thereby functions as a core while air functions as a clad to produce an optical waveguide having an extremely large specific refractive-index difference, which generates SC light near visible light. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：实现在可见光附近产生SC（超连续体）光的光波导。解决方案：放置在硅衬底11上的石英玻璃膜12的导光部分12a用于引导光。孔13形成在导光部12a的两侧的位置。在硅基板11的与导光部12a的底面相对的一部分上形成空位14，空隙14与孔13连接。因此，导光部12a的整个上表面被空气整个下表面被空位14中的空气包围，并且大部分两个侧面被孔13中的空气包围。因此，导光部12a用作芯，空气用作包层以产生光波导具有非常大的比折射率差异，其在可见光附近产生SC光。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2003057457A Optical filter 审中-公开
标题翻译：光学过滤器
公开(公告)号：JP2003057457A
公开(公告)日：2003-02-26
申请号：JP2001241367
申请日：2001-08-08
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： SAIDA TAKASHI , HIMENO AKIRA , OKAMOTO KATSUNARI , TAKIGUCHI KOICHI , MIZUNO TAKAYUKI , OGUMA MANABU
IPC分类号： G02B6/12 , G02B6/10 , G02B6/34 , G02F1/01 , G02F1/313
CPC分类号： G02B6/29355 , G02B6/105 , G02B6/2938 , G02B6/29386 , G02B2006/12135 , G02B2006/12159
摘要： PROBLEM TO BE SOLVED: To provide an optical filter which can easily adjust parameters, easily compensate double refraction and a temperature dependency and does not essentially have dispersion. SOLUTION: The optical filter is provided with optical waveguides 11a and 11b for inputs, an optical coupler 12 to bisect light from the waveguides, an optical coupler 13a connected to one output of the optical coupler 12, an optical coupler 13b connected to the other output of the optical coupler 12, a first group of two optical delay waveguides 14a and 14b connected to the outputs of the optical coupler 13a, a second group of two optical delay waveguides 15a and 15b connected to the outputs of the optical coupler 13b, an optical coupler 16a to couple light from the first group of optical delay waveguides 14a and 14b, an optical coupler 16b to couple light from the second group of optical delay waveguides 15a and 15b, a multimode interference optical coupler 17 to couple light from the optical coupler 16a to light from the optical coupler 16b, and optical waveguides 18a and 18b for outputs to guide the outputs of the optical coupler 17.
摘要翻译：要解决的问题：为了提供能够容易地调节参数的光学滤波器，容易地补偿双折射和温度依赖性，并且基本上不具有色散。解决方案：光滤波器设置有用于输入的光波导11a和11b，用于将来自波导的光二等分的光耦合器12，连接到光耦合器12的一个输出的光耦合器13a，连接到另一输出连接到光耦合器13a的输出的第一组两个光学延迟波导14a和14b，连接到光耦合器13b的输出的两个光学延迟波导15a和15b的第二组，光学耦合器用于耦合来自第一组光学延迟波导14a和14b的光的光耦合器16b，用于耦合来自第二组光学延迟波导15a和15b的光的光耦合器16b，耦合来自光耦合器16a的光的多模干涉光耦合器17 以及用于输出的光波导18a和18b，用于引导光耦合器17的输出。

8. 发明专利

JP2003046446A Optical signal processing circuit 有权
标题翻译：光信号处理电路
公开(公告)号：JP2003046446A
公开(公告)日：2003-02-14
申请号：JP2001230398
申请日：2001-07-30
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： SAIDA TAKASHI , TAKIGUCHI KOICHI , OKAMOTO KATSUNARI
IPC分类号： H04B10/516 , H04B10/556 , H04B10/61 , H04B10/04 , H04B10/00 , H04B10/06 , H04B10/142 , H04B10/152
摘要： PROBLEM TO BE SOLVED: To provide an optical signal processing circuit that adopts a multi- value differential phase modulation signal and that can easily set an optical signal modulation threshold.
SOLUTION: The optical signal processing circuit comprises an optical input port 11, a photocoupler 12, an optical delay guide path pair 13 connected to the photocoupler 12 and comprising two optical guide paths whose length differs from each other, a multi-mode interference photocoupler 14 which acts like an optical hybrid element, and an optical output port 15. The photocoupler 12 divides the optical signal pulse received from the input port 11 into two which are led to the optical delay guide path pair 13 to which a delay time is set to be the same as the time of a time slot τ of the input signal, thereby a threshold is easily set for receiving the optical signal subjected to multi-value differential phase modulation.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种采用多值差分相位调制信号并且可以容易地设置光信号调制阈值的光信号处理电路。解决方案：光信号处理电路包括光输入端口11，光电耦合器12，连接到光电耦合器12的光延迟引导路径对13，并且包括长度彼此不同的两个光导路径，多模干涉光电耦合器14 其作用如同光混合元件和光输出端口15.光电耦合器12将从输入端口11接收的光信号脉冲分为两个，其被引导到光延迟引导路径对13，延迟时间被设置为与输入信号的时隙τ的时间相同，从而容易设置用于接收经受多值差分相位调制的光信号的阈值。

9. 发明专利

JPS61126533A Optical fiber transmission line 失效
标题翻译：光纤传输线
公开(公告)号：JPS61126533A
公开(公告)日：1986-06-14
申请号：JP24845784
申请日：1984-11-24
申请人： Nippon Telegr & Teleph Corp
发明人： NODA JUICHI , OKAMOTO KATSUNARI , SASAKI YUTAKA , HOSAKA TOSHITO
IPC分类号： G02B6/00 , G02B6/02 , G02B6/10 , G02F1/01 , H04B10/00 , H04B10/07 , H04B10/25
摘要： PURPOSE:To improve the stability of a polarized wave and to increase the reliability of coherent optical transmission by making polarized light on a single- mode fiber and connecting a polarization maintaining optical fiber to an end part where a maintained plane of polarization is most inferior. CONSTITUTION:The stress birefringent type polarization maintaining optical fiber 8 is connected to the incidence end 9 of the single-mode optical fiber 3. The projection light of a semiconductor laser is transmitted while its plane of polarization is made coincident with the main axis of the polarization maintaining optical fiber. Thus, the polarization maintaining optical fiber is used where the influence of an external field is exerted most between the light source and optical fiber cable, so a polarized wave is extremely stable at the projection end of the optical fiber cable. Therefore, variation of the polarization wave in the optical fiber at a part which is exposed to the external field at the projection end is compensated by a polarization plane controller 4 to obtain a high S/N.
摘要翻译：目的：为了提高极化波的稳定性，并通过在单模光纤上形成偏振光并将偏振保持光纤连接到维持极化面最差的端部，提高相干光透射的可靠性。构成：应力双折射型偏振保持光纤8连接到单模光纤3的入射端9.半导体激光器的投影光透射，同时其偏振面与主轴的主轴一致保偏光纤。因此，在光源和光纤电缆之间施加最外部场的影响的情况下使用偏振保持光纤，因此在光纤线的投影端极化波非常稳定。因此，通过偏振面控制器4补偿在突出端暴露于外场的部分处的光纤中的偏振波的变化，以获得高S / N。

10. 发明专利

JPS6155623A Optical isolator and light source provided with isolator 失效
标题翻译：光隔离器和光隔离器提供隔离器
公开(公告)号：JPS6155623A
公开(公告)日：1986-03-20
申请号：JP17802584
申请日：1984-08-27
申请人： Nippon Telegr & Teleph Corp
发明人： NODA JUICHI , OKAMOTO KATSUNARI , TAKADA KAZUMASA , YOKOHAMA ITARU
IPC分类号： G02B6/00 , G02B27/28
摘要： PURPOSE: To obtain a highly reliable, cheap and small-sized optical isolator by arranging two fiber type polarizers to make principal axes to 45°, and providing a device that makes light beam parallel light between the two polarizers and squeeze it into fibers and a devide that gives Faraday rotation to the parallel light.
CONSTITUTION: Fiber type polarizers 6-a, 6-b made by winding 10m of stress-giving type birefringent optical fibers 6-a, 6-b are arranged to make their principal axes to 45°. Light emitted from the fiber type polarizer 6-a is made to parallel light by a lens 2-a, and the plane of polarization is rotated by 45° by a Raraday element provided with a magnet and squeezed into the fiber polarizer 6-b by a lens 2-b. On the other hand, reflected light from the fiber polarizer 6-b passes through the lens 2-b and the plane of polarization is rotated by 45° by the element 4, and intercepted by the fiber polarizer 6-a. Thus, a highly reliable, cheap and small-sized optical isolator is obtained.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：为了获得高度可靠，价廉物美的光隔离器，通过布置两根光纤型偏振器使主轴达到45度，并提供使光束在两个偏振器之间平行光并将其挤压成纤维的装置，一个使法拉第旋转到平行光的角色。构成：通过缠绕10m的应力给定型双折射光纤6-a，6-b制成的光纤型偏振器6-a，6-b被布置成使其主轴为45度。从光纤型偏振器 6-a由透镜2-a制成平行光，偏光面旋转45度。通过设置有磁体的Raraday元件并且通过透镜2-b被挤压到光纤偏振器6-b中。另一方面，来自光纤偏振片6-b的反射光通过透镜2-b，偏光面旋转45度。通过元件4被光纤偏振器6-a截取。因此，获得了高度可靠，便宜且小型的光隔离器。

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