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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：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：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：EP2778771A4
公开(公告)日：2016-03-02
申请号：EP12834969
申请日：2012-09-28
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： SAKAI TAKESHI , MURE MASAHITO , ICHIKAWA JUNICHIRO
IPC: G02F1/035 , H04B10/40 , H04B10/50 , H04B10/516 , H04B10/548 , H04B10/564 , H04B10/588 , H04B10/60
CPC classification number: H04B10/548 , H04B10/5053 , H04B10/5057 , H04B10/5165 , H04B10/564
Abstract: It is possible to suppress carrier light with a simple configuration when modulating the carrier light to generate optical sideband components. An optical carrier-suppressed signal generator includes first splitting means used to split input carrier light into two light beams, an optical modulator which modulates one split carrier light beam and outputs light including optical sideband components, a phase modulator which phase-modulates another split carrier light beam, and second or third splitting means used to split the output light of the optical modulator into two light beams. The output light split by the second or third splitting means and the output light of the phase modulator are multiplexed to obtain the amplitude of the signal waveform of optical power, and the optical modulator is controlled such that the obtained value is minimized.
Abstract translation: 调制载波时可以以简单的结构来抑制载波，产生光边带分量。 光载波抑制信号发生器包括用于将输入载波光分成两束的第一分离装置，调制一个分离载波光束并输出包括光边带分量的光的光调制器，相位调制器， 光束，以及用于将光学调制器的输出光分成两束光的第二或第三分离装置。 由第二或第三分离装置分离的输出光和相位调制器的输出光被多路复用以获得光功率的信号波形的幅度，并且控制光调制器使得所获得的值最小化。
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Patent Agency Ranking
公开(公告)号：EP2071388A4
公开(公告)日：2013-05-29
申请号：EP07828740
申请日：2007-09-28
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： KINPARA YUHKI , ICHIKAWA JUNICHIRO , OIKAWA SATOSHI
CPC classification number: G02F1/0356 , G02F1/0316 , G02F1/2255 , G02F2001/212 , G02F2201/127
Abstract: To provide a light control device which is possible to realize a velocity matching between a microwave and an optical wave or an impedance matching of the microwaves even though a signal path having a high impedance of 70 © or more, and is possible to reduce a driving voltage. The light control device having an electro-optical effect includes a thin plate 1 having a thickness of 10 µm or less, an optical waveguide 2 formed in the thin plate, and a controlling electrode for controlling light which passes through the optical waveguide, wherein the controlling electrode includes a first electrode and a second electrode which are disposed so as to interpose the thin plate, wherein the first electrode has a coplanar type electrode which includes at least a signal electrode 4 and a grounding electrode 5 (51), wherein the second electrode includes at least a grounding electrode 54 and is configured so as to apply an electric field to the optical waveguide in corporation with the signal electrode of the first electrode, and wherein the signal electrode of the first electrode includes a branched signal path in which at least one signal path is branched into two or more in the middle of the path.
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公开(公告)号：EP2141532A4
公开(公告)日：2013-03-06
申请号：EP08739186
申请日：2008-03-28
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： OIKAWA SATOSHI , ICHIKAWA JUNICHIRO , KINPARA YUHKI
CPC classification number: G02F1/0356 , G02F1/2255 , G02F2202/20 , G02F2202/42
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公开(公告)号：EP2006732A4
公开(公告)日：2010-01-20
申请号：EP07737796
申请日：2007-03-05
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： KONDOU KATSUTOSHI , KINPARA YUHKI , YAMAMOTO FUTOSHI , ICHIKAWA JUNICHIRO
CPC classification number: G02B6/1228 , G02B6/136 , G02B2006/1204 , G02B2006/12042 , G02B2006/12097 , G02F1/035 , G02F1/377
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公开(公告)号：EP2703855A4
公开(公告)日：2014-12-17
申请号：EP12777019
申请日：2012-04-27
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： ICHIOKA MASAYUKI , SAKUMA MITSURU , ICHIKAWA JUNICHIRO
CPC classification number: G02B6/12 , G02F1/0305 , G02F1/0356 , G02F2201/07 , G02F2201/54 , G02F2202/022 , G02F2202/28 , G02F2203/21
Abstract: Provided is an optical waveguide device capable of reducing stress that occurs inside an optical waveguide substrate due to a difference in a coefficient of thermal expansion. The optical waveguide device (10) includes an optical waveguide substrate (11) having a thickness of 30 µm or less, and a liquid crystal polymer substrate (12) which holds the optical waveguide substrate (11) and has permittivity lower than that of the optical waveguide substrate (11). The optical waveguide substrate (11) and the liquid crystal polymer substrate (12) are bonded to each other by an adhesive layer (14). Coefficients of thermal expansion of the optical waveguide substrate (11) and the liquid crystal polymer substrate (12) have anisotropy in each substrate plane, and a relative direction between the optical waveguide substrate (11) and the liquid crystal polymer substrate (12) is adjusted in such a manner that anisotropic axial directions of the optical waveguide substrate (11) and anisotropic axial directions the liquid crystal polymer substrate (12) are aligned.
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公开(公告)号：EP2133733A4
公开(公告)日：2012-06-13
申请号：EP08739204
申请日：2008-03-28
Applicant: SUMITOMO OSAKA CEMENT CO LTD
Inventor： OIKAWA SATOSHI , ICHIKAWA JUNICHIRO , KINPARA YUHKI
CPC classification number: G02F1/0356 , G02F1/0316 , G02F1/0327 , G02F1/2255 , G02F2201/12 , G02F2202/07
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