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公开(公告)号：CA2456218C
公开(公告)日：2012-10-23
申请号：CA2456218
申请日：2002-07-31
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： ICHIKAWA JUNICHIRO , FUJITA TAKAHISA , YAMANE YUJI , MIYAZAKI NORIKAZU , SAKUMA MITSURU
Abstract: The present invention offers an optical modulator capable of efficiently transmitting electric signals to an interaction part of a signal electrode with acting on an optical waveguide even when the electric signals are in a high frequency zone, and capable of performing high frequency broad-band operation. The optical modulator comprises a substrate (1) formed of a material having electro-optical effect, an optical waveguide formed on the substrate, and an electrode (3) for modulating the light passing through the optical waveguide. The optical modulator is characterized in that an electric signal connection pad unit (6) is provided on a part of the electrode, and in that the thickness of the substrate located on a lower part of at least the electric signal connection pad unit (6) and directly or indirectly continuous to the electric signal connection pad unit (6) is thinner than the thickness of another parts of the substrate including an interaction part of the electrode by cutting off a part of the substrate, and is less than about 250 µm.
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公开(公告)号：CA2456218A1
公开(公告)日：2003-02-13
申请号：CA2456218
申请日：2002-07-31
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： MIYAZAKI NORIKAZU , SAKUMA MITSURU , YAMANE YUJI , ICHIKAWA JUNICHIRO , FUJITA TAKAHISA
Abstract: An optical modulator capable of efficiently transmitting electric signals to an acting portion of a signal electrode with acting on an optical waveguide even when the electric signals are in high frequency zone, and capable of performing high frequency broad band operation. The optical modulator comprises a substrate (1) formed of a material having electro-optical effect , an optical waveguide formed on the substrate, and an electrode (3) for modulating the light passing through the optical waveguide. The optical modulator is characterized in that an electric signal connection pad unit (6 ) is proide on a part of the electrode, and in that the thickness of the substrate which is located at least on a lower part of the electric signal connection pad unit (6) and directly or indirectly continuous to the electri c signal connection pad unit (6) made is smaller than the thickness of other parts of the substrate.
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公开(公告)号：CA2520633C
公开(公告)日：2013-08-06
申请号：CA2520633
申请日：2004-03-26
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： HASHIMOTO YOSHIHIRO , ICHIKAWA JUNICHIRO , HIGUMA KAORU , FUJITA TAKAHISA
Abstract: A method and device for adequately controlling the DC bias of each of the optical modulating sections of an optical modulator even while the optical modulator is operating in normal mode and even with a simple structure. An optical modulator bias controller (B) for controlling the DC bias of each optical modulating section of an optical modulator (1) is characterized by comprising DC bias application means (3) for applying a DC bias to each of the optical modulating sections, a low-frequency signal superimposing circuit (2) for superimposing a low-frequency signal f B with a specific frequency on a modulating signal b applied to each optical modulating section, optical sensing means (9) for sensing a change of the intensity of the light wave passing through the combining section, and bias control means (4) for extracting the change of the intensity of light corresponding to the low-frequency signal from the optical sensing means and controlling the DC bias application means according to the extracted change of the intensity of light.
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公开(公告)号：CA2520633A1
公开(公告)日：2004-10-14
申请号：CA2520633
申请日：2004-03-26
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： HASHIMOTO YOSHIHIRO , HIGUMA KAORU , ICHIKAWA JUNICHIRO , FUJITA TAKAHISA
Abstract: A method and device for adequately controlling the DC bias of each of the optical modulating sections of an optical modulator even while the optical modulator is operating in normal mode and even with a simple structure. An optical modulator bias controller (B) for controlling the DC bias of each optical modulating section of an optical modulator (1) is characterized by comprising DC bias application means (3) for applying a DC bias to each of t he optical modulating sections, a low-frequency signal superimposing circuit (2 ) for superimposing a low-frequency signal fB with a specific frequency on a modulating signal b applied to each optical modulating section, optical sensing means (9) for sensing a change of the intensity of the light wave passing through the combining section, and bias control means (4) for extracting the change of the intensity of light corresponding to the low- frequency signal from the optical sensing means and controlling the DC bias application means according to the extracted change of the intensity of ligh t.
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公开(公告)号：EP1950602A4
公开(公告)日：2010-12-22
申请号：EP06832545
申请日：2006-11-13
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： SHIMIZU RYO , FUJITA TAKAHISA , SUGAMATA TORU
IPC: G02F1/03
CPC classification number: G02F1/0327 , G02F2202/20
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Patent Agency Ranking
公开(公告)号：EP2345922A2
公开(公告)日：2011-07-20
申请号：EP11154951
申请日：2006-10-31
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： SHIMIZU RYO , FUJITA TAKAHISA , SUGAMATA TORU
CPC classification number: G02F1/0123 , G02F1/0305 , G02F1/0356
Abstract: An optical modulator according to the invention comprises an optical modulation element (1) including a substrate having electro-optic effect, an optical waveguide formed on the substrate, and a modulation electrode for modulating light passing through the optical waveguide; and a terminal substrate (30) disposed outside the substrate to supply a modulation signal for driving the optical modulation element (1) from the optical modulation element (1) to a terminator (9), wherein the terminal substrate (30) is provided with the terminator (9), and a modulation signal monitoring output line (35) for monitoring the voltage amplitude of the modulation signal inputted to the terminator (9).
Abstract translation: 根据本发明的光调制器包括：光调制元件（1），包括具有电光效应的基板，形成在基板上的光波导和用于调制通过光波导的光的调制电极; 以及端子基板（30），其设置在所述基板的外侧，以将用于将所述光调制元件（1）驱动的调制信号从所述光调制元件（1）提供给终端器（9），其中，所述端子基板（30） 终端器（9）和用于监视输入到终端器（9）的调制信号的电压振幅的调制信号监视输出线（35）。
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公开(公告)号：EP1953584A4
公开(公告)日：2009-12-30
申请号：EP06822646
申请日：2006-10-31
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： SHIMIZU RYO , FUJITA TAKAHISA , SUGAMATA TORU
CPC classification number: G02F1/0123 , G02F1/0305 , G02F1/0356
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公开(公告)号：JP2007139987A
公开(公告)日：2007-06-07
申请号：JP2005331954
申请日：2005-11-16
Applicant: Sumitomo Osaka Cement Co Ltd , 住友大阪セメント株式会社
Inventor： SHIMIZU AKIRA , FUJITA TAKAHISA , SUGAMATA TORU
IPC: G02F1/03
CPC classification number: G02F1/0327 , G02F2202/20
Abstract: PROBLEM TO BE SOLVED: To provide an optical modulator that suppresses deterioration in modulation characteristics by stopping a radiation mode of a microwave generated in a connection substrate or terminating substrate from entering a signal electrode etc., of an optical modulator. SOLUTION: The optical modulator including a substrate having electrooptical effect, an optical modulating element 1 having an optical waveguide formed on the substrate and a modulation electrode (including the signal electrode 2) for modulating light passing in the optical waveguide, and the connection substrate 4 which is arranged outside the substrate and supplies a microwave signal to drive the optical modulating element to the optical modulating element is characterized in that a signal input end 22 and a signal output end 23 are formed on the connection substrate 20 and the connection substrate is provided with a recoupling suppressing means of suppressing recoupling of the radiation mode 24 of the microwave signal input to the signal input end 22 with the signal output end 23. COPYRIGHT: (C)2007,JPO&INPIT
Abstract translation: 解决的问题：提供一种光调制器，其通过停止在连接基板或端接基板中产生的微波的辐射模式进入光调制器的信号电极等来抑制调制特性的劣化。 解决方案：包括具有电光效应的基板的光调制器，具有形成在基板上的光波导的光调制元件1和用于调制在光波导中通过的光的调制电极（包括信号电极2），以及 布置在基板外部并提供微波信号以将光调制元件驱动到光调制元件的连接基板4的特征在于，信号输入端22和信号输出端23形成在连接基板20上，并且连接 基板设置有重传抑制装置，其用信号输出端23抑制输入到信号输入端22的微波信号的辐射模式24的重新耦合。（C）2007，JPO＆INPIT
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9.发明专利
公开(公告)号：JP2006033609A
公开(公告)日：2006-02-02
申请号：JP2004211960
申请日：2004-07-20
Applicant: Sumitomo Osaka Cement Co Ltd , 住友大阪セメント株式会社
Inventor： FUJITA TAKAHISA , OIKAWA SATORU
IPC: G02F1/03 , H04B10/2513 , H04B10/2537 , H04B10/516 , H04B10/61
Abstract: PROBLEM TO BE SOLVED: To provide a light modulating method for preventing the deterioration of a modulation signal characteristic when generating duo binary signal light by the use of Mach-Zehnder type light modulator, securing a signal amplitude to sufficiently operate an electric amplifier for amplifying a modulation signal, simplifying a circuit scale, and contributing to simple manufacturing and cost reduction, and to provide a light transmitting apparatus using the method. SOLUTION: The duo binary signal light is generated by the use of the Mach-Zehnder type light modulator 1 by the light modulating method. A signal Q outputted from an encoder circuit and a reverse signal Q bar are shifted for a prescribed time, and then, impressed on each modulation electrode. Consequently, phase changes Φ A and Φ B of the light in two branch waveguides are adjusted to be the same phases. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract translation: 要解决的问题：提供一种光调制方法，用于通过使用马赫 - 曾德尔型光调制器产生二进制二进制信号光来防止调制信号特性的劣化，确保信号幅度以充分地操作电放大器 用于放大调制信号，简化电路规模，并且有助于简单的制造和降低成本，并提供使用该方法的光发射装置。 解决方案：通过光调制方法通过使用马赫 - 曾德尔型光调制器1产生二进制二进制信号光。 从编码器电路输出的信号Q和反向信号Q bar移动规定时间，然后施加在各调制电极上。 因此，将两个分支波导中的光的相位变化Φ
A 和Φ B 调整为相同的相位。 版权所有（C）2006，JPO＆NCIPI -
10.发明专利
公开(公告)号：JP2004077513A
公开(公告)日：2004-03-11
申请号：JP2002233439
申请日：2002-08-09
Applicant: Sumitomo Osaka Cement Co Ltd , 住友大阪セメント株式会社
Inventor： FUJITA TAKAHISA , SAKANE TOSHIO
CPC classification number: G02F1/0123 , G02F2203/21
Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for stabilizing an operation point and optical output of an external optical modulator (OM) in which waveform distortion in an electric signal train is suppressed and the operation point and the optical output of a modulation curve of the OM is stably set even when variation of the optical output of a light source itself and variation of transmittance in the OM exist. SOLUTION: In the method for stabilizing the operation point and the optical output of the external OM which has the light source 12, the external OM 2 to modulate light from the light source, a photodetector 14 to detect light outputted from the external OM and a DC bias controlling means to control the DC bias to determine the operation point of the modulation curve of the external OM in accordance with the output of the photodetector and to apply it to the external OM, and a low frequency signal 69 with a frequency lower than the lower limit of a signal frequency band of an input signal to be inputted to the external OM is superposed on the DC bias. Simultaneously, a low frequency component included in an output of the photodetector is taken out, the output of the low frequency component is normalized based on the low frequency signal, and light outputted from the light source is controlled in accordance with the normalized low frequency component. COPYRIGHT: (C)2004,JPO
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