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1. 发明授权

US06999223B2 Optical modulator 有权
公开(公告)号：US06999223B2
公开(公告)日：2006-02-14
申请号：US10704920
申请日：2003-11-12
申请人： Minoru Seino , Tetsuo Ishizaka , Takehito Tanaka , Masaharu Doi , Tadao Nakazawa
发明人： Minoru Seino , Tetsuo Ishizaka , Takehito Tanaka , Masaharu Doi , Tadao Nakazawa
IPC分类号： G02F1/03 , G02F1/07
CPC分类号： G02F1/2255
摘要： The present invention relates to an optical modulator allowing appropriate interaction between signal electrodes and an optical waveguide, only by matching phases at input ends of the signal electrodes. The optical modulator includes an optical waveguide with its center part branched into two at two Y-branch waveguides, forming first and second waveguide arms, a first signal electrode transmitting a first electric signal interacting with first light propagating through the first waveguide arm in a predetermined manner, a second signal electrode transmitting a second electric signal interacting with second light propagating through the second waveguide arm in a predetermined manner, and earthed electrodes, and can match the interacting timing between the first electric signal and the first light to the interacting timing between the second electric signal and the second light, at a first input end supplying the first electric signal and a second input end supplying the second electric signal.

2. 发明授权

US06678428B2 Optical modulator 有权
公开(公告)号：US06678428B2
公开(公告)日：2004-01-13
申请号：US09966600
申请日：2001-10-01
申请人： Minoru Seino , Tetsuo Ishizaka , Takehito Tanaka , Masaharu Doi , Tadao Nakazawa
发明人： Minoru Seino , Tetsuo Ishizaka , Takehito Tanaka , Masaharu Doi , Tadao Nakazawa
IPC分类号： G02F1035
CPC分类号： G02F1/2255
摘要： The present invention relates to an optical modulator allowing appropriate interaction between signal electrodes and an optical waveguide, only by matching phases at input ends of the signal electrodes. The optical modulator includes an optical waveguide with its center part branched into two at two Y-branch waveguides, forming first and second waveguide arms, a first signal electrode transmitting a first electric signal interacting with first light propagating through the first waveguide arm in a predetermined manner, a second signal electrode transmitting a second electric signal interacting with second light propagating through the second waveguide arm in a predetermined manner, and earthed electrodes, and can match the interacting timing between the first electric signal and the first light to the interacting timing between the second electric signal and the second light, at a first input end supplying the first electric signal and a second input end supplying the second electric signal.

3. 发明授权

US06594407B2 Optical modulator of clock modulation type 有权
公开(公告)号：US06594407B2
公开(公告)日：2003-07-15
申请号：US09799120
申请日：2001-03-06
申请人： Masaharu Doi , Tetsuo Ishizaka , Takehito Tanaka
发明人： Masaharu Doi , Tetsuo Ishizaka , Takehito Tanaka
IPC分类号： G02F101
CPC分类号： H04B10/505 , G02F1/2255 , G02F2201/16 , H04B10/5051 , H04B10/508 , H04B10/5162
摘要： A first optical waveguide, a second optical waveguide, a first electrode, and a second electrode are integrated on a substrate. An optical modulator is provided with a clock signal generator for generating an RZ signal by applying a clock signal to either the first or second electrode, and an NRZ data signal generator for supplying an NRZ data signal to the remaining electrode. Thus, the space required by the optical modulator is reduced while tolerance of the same is improved, thus reducing costs for constructing the optical modulator.

4. 发明授权

US07006715B2 Optical modulator of clock modulation type 有权
公开(公告)号：US07006715B2
公开(公告)日：2006-02-28
申请号：US10437186
申请日：2003-05-14
申请人： Masaharu Doi , Tetsuo Ishizaka , Takehito Tanaka
发明人： Masaharu Doi , Tetsuo Ishizaka , Takehito Tanaka
IPC分类号： G02F1/01 , H04B10/04
CPC分类号： H04B10/505 , G02F1/2255 , G02F2201/16 , H04B10/5051 , H04B10/508 , H04B10/5162
摘要： A first optical waveguide, a second optical waveguide, a first electrode, and a second electrode are integrated on a substrate. An optical modulator is provided with a clock signal generator for generating an RZ signal by applying a clock signal to either the first or second electrode, and an NRZ data signal generator for supplying an NRZ data signal to the remaining electrode. Thus, the space required by the optical modulator is reduced while tolerance of the same is improved, thus reducing costs for constructing the optical modulator.

5. 发明授权

US06950218B2 Optical modulator 有权
标题翻译：光调制器
公开(公告)号：US06950218B2
公开(公告)日：2005-09-27
申请号：US10855582
申请日：2004-05-28
申请人： Masaki Sugiyama , Tadao Nakazawa , Masaharu Doi , Takehito Tanaka , Akira Ishii
发明人： Masaki Sugiyama , Tadao Nakazawa , Masaharu Doi , Takehito Tanaka , Akira Ishii
IPC分类号： G02F1/035 , G02F1/03 , G02F1/07 , G02F1/225 , G02F1/245
CPC分类号： G02F1/0316 , G02F1/225
摘要： The present invention has an object to provide a Mach-Zehnder optical modulator with the excellent productivity and reliability, which can obtain a favorable optical response characteristic even if a high frequency electric signal is applied to a signal electrode. To this end, the present optical modulator is configured such that, in a Mach-Zehnder optical modulator in which an optical waveguide and a coplanar electrode are formed on a surface of a substrate having an electro-optic effect, floating electrodes formed using a conducting material, are provided on side faces along parallel waveguides, among side faces substantially perpendicular to the surface of the substrate. Thus, even when a high frequency electric signal is applied to the signal electrode, a phenomenon is suppressed in which a particular frequency resonates within the substrate, and an occurrence of dip in a particular frequency is avoided.
摘要翻译：本发明的目的是提供一种具有优异的生产率和可靠性的马赫 - 策德尔光调制器，即使向信号电极施加高频电信号也能获得良好的光响应特性。为此，本发明的光调制器被配置为使得在具有电光效应的基板的表面上形成有光波导和共面电极的马赫 - 曾德尔光调制器中，使用导电材料沿着平行波导的侧面设置在基本上垂直于基板的表面的侧面之中。因此，即使当向信号电极施加高频电信号时，抑制了特定频率在基板内谐振的现象，并且避免了特定频率的下降的发生。

6. 发明申请

US20050134952A1 OPTICAL MODULATOR 有权
标题翻译：光学调制器
公开(公告)号：US20050134952A1
公开(公告)日：2005-06-23
申请号：US10855582
申请日：2004-05-28
申请人： Masaki Sugiyama , Tadao Nakazawa , Masaharu Doi , Takehito Tanaka , Akira Ishii
发明人： Masaki Sugiyama , Tadao Nakazawa , Masaharu Doi , Takehito Tanaka , Akira Ishii
IPC分类号： G02F1/035 , G02F1/03 , G02F1/07 , G02F1/225
CPC分类号： G02F1/0316 , G02F1/225
摘要： The present invention has an object to provide a Mach-Zehnder optical modulator with the excellent productivity and reliability, which can obtain a favorable optical response characteristic even if a high frequency electric signal is applied to a signal electrode. To this end, the present optical modulator is configured such that, in a Mach-Zehnder optical modulator in which an optical waveguide and a coplanar electrode are formed on a surface of a substrate having an electro-optic effect, floating electrodes formed using a conducting material, are provided on side faces along parallel waveguides, among side faces substantially perpendicular to the surface of the substrate. Thus, even when a high frequency electric signal is applied to the signal electrode, a phenomenon is suppressed in which a particular frequency resonates within the substrate, and an occurrence of dip in a particular frequency is avoided.
摘要翻译：本发明的目的是提供一种具有优异的生产率和可靠性的马赫 - 策德尔光调制器，即使向信号电极施加高频电信号也能获得良好的光响应特性。为此，本发明的光调制器被配置为使得在具有电光效应的基板的表面上形成有光波导和共面电极的马赫 - 曾德尔光调制器中，使用导电材料沿着平行波导的侧面设置在基本上垂直于基板的表面的侧面之中。因此，即使当向信号电极施加高频电信号时，抑制了特定频率在基板内谐振的现象，并且避免了特定频率的下降的发生。

7. 发明授权

US06741379B2 Optical module having element for optical phase shift using electro-optic effect 有权
标题翻译：具有使用电光效应的光学相移元件的光学模块
公开(公告)号：US06741379B2
公开(公告)日：2004-05-25
申请号：US10200758
申请日：2002-07-24
申请人： Yoshihiko Kaitoh , Tetsuo Ishizaka , Takehito Tanaka
发明人： Yoshihiko Kaitoh , Tetsuo Ishizaka , Takehito Tanaka
IPC分类号： G02F101
CPC分类号： G02F1/0316 , G02F1/0305 , G02F1/0356 , G02F1/2255 , G02F2001/212
摘要： The optical module has an element mounted thereupon for shifting an optical phase by the electro-optic effect, and includes an element for shifting an optical phase by an electro-optic effect having a signal electrode and a ground electrode formed thereupon; a connector for supplying a control signal of a microwave region to the signal electrode of the element, having a center conductor and an outer conductor; and a repeating board formed on a dielectric wafer having a coplanar line connecting the signal electrode and the ground electrode with the center conductor and the outer conductor of the connector respectively on the dielectric wafer, wherein an air layer is formed on the lower portion of the repeating board on which the center conductor of the connector is disposed.
摘要翻译：光学模块具有安装在其上的用于通过电光效应移动光学相位的元件，并且包括用于通过其上形成有信号电极和接地电极的电光效应来移动光学相位的元件; 用于向所述元件的信号电极提供微波区域的控制信号的连接器，具有中心导体和外部导体; 以及形成在电介质晶片上的重复板，其具有将信号电极和接地电极与连接器的中心导体和外部导体分别连接在电介质晶片上的共面线，其中空气层形成在电介质晶片的下部连接器的中心导体设置在其上的重复板。

8. 发明授权

US07551820B2 Optical device 有权
标题翻译：光学装置
公开(公告)号：US07551820B2
公开(公告)日：2009-06-23
申请号：US12035692
申请日：2008-02-22
申请人： Akira Ishii , Takehito Tanaka , Masaharu Doi , Tetsu Hasegawa
发明人： Akira Ishii , Takehito Tanaka , Masaharu Doi , Tetsu Hasegawa
IPC分类号： G02B6/42 , G02F1/035
CPC分类号： G02B6/1228 , G02B6/14 , G02B6/29352 , G02B6/29385 , G02B2006/12142 , G02B2006/12152 , G02F1/0123 , G02F1/225 , G02F1/3132 , G02F2201/58
摘要： An optical device including (a) a substrate having an electro-optic effect; (b) an optical waveguide formed on a surface layer portion of said substrate and including an optical waveguide for performing optical modulation for light inputted to said substrate and an output optical waveguide and a monitoring optical waveguide branched from and connected to a downstream side portion of said modulating optical waveguide, said monitoring optical waveguide guiding light for monitoring optical modulation operation of said modulating optical waveguide; and (c) a reflecting portion being provided on the downstream side of said monitoring optical waveguide for reflecting light propagated along said monitoring optical waveguide, the width of a reflection face of said reflecting portion being substantially equal to the cut-out width of said monitoring optical waveguide.
摘要翻译：一种光学装置，包括（a）具有电光效应的基板; （b）形成在所述基板的表层部分上的光波导，并且包括用于对输入到所述基板的光执行光调制的光波导和从所述基板的下游侧部分分支并连接到所述基板的输出光波导和监视光波导所述调制光波导，所述监测光波导引导光用于监视所述调制光波导的光调制操作; 以及（c）反射部分设置在所述监视光波导的下游侧，用于反射沿所述监视光波导传播的光，所述反射部分的反射面的宽度基本上等于所述监视的切出宽度光波导。

9. 发明授权

US07689078B2 Optical device 有权
标题翻译：光学装置
公开(公告)号：US07689078B2
公开(公告)日：2010-03-30
申请号：US12035720
申请日：2008-02-22
申请人： Akira Ishii , Takehito Tanaka , Masaharu Doi , Tetsu Hasegawa
发明人： Akira Ishii , Takehito Tanaka , Masaharu Doi , Tetsu Hasegawa
IPC分类号： G02B6/42 , G02F1/035
CPC分类号： G02B6/1228 , G02B6/14 , G02B6/29352 , G02B6/29385 , G02B2006/12142 , G02B2006/12152 , G02F1/0123 , G02F1/225 , G02F1/3132 , G02F2201/58
摘要： An optical device including (a) a substrate having an electro-optic effect; (b) a modulating optical waveguide formed on a surface layer portion of said substrate and forming an interference optical modulator for modulating input light; (c) an output optical waveguide formed on said surface layer portion of said substrate and connected to a downstream side portion of said modulating optical waveguide; and (d) a branching monitoring section for monitoring branched light of light propagated along said output optical waveguide and emitted from an outgoing end face of said substrate. The output waveguide has a reduced width region in which the waveguide width is reduced.
摘要翻译：一种光学装置，包括（a）具有电光效应的基板; （b）形成在所述衬底的表层部分上并形成用于调制输入光的干涉光调制器的调制光波导; （c）形成在所述衬底的所述表面层部分上并连接到所述调制光波导的下游侧部分的输出光波导; 和（d）分支监视部分，用于监测沿着所述输出光波导传播并从所述基板的出射端面发射的光的分支光。输出波导具有减小的波导宽度减小的宽度区域。

10. 发明授权

US07526161B2 Optical device 有权
标题翻译：光学装置
公开(公告)号：US07526161B2
公开(公告)日：2009-04-28
申请号：US11775917
申请日：2007-07-11
申请人： Akira Ishii , Takehito Tanaka , Masaharu Doi , Tetsu Hasegawa
发明人： Akira Ishii , Takehito Tanaka , Masaharu Doi , Tetsu Hasegawa
IPC分类号： G02B6/42 , G02F1/035
CPC分类号： G02B6/1228 , G02B6/14 , G02B6/29352 , G02B6/29385 , G02B2006/12142 , G02B2006/12152 , G02F1/0123 , G02F1/225 , G02F1/3132 , G02F2201/58
摘要： An optical device is disclosed which suppresses a bias shift which is a deviation of a phase relationship between output signal light and monitoring light. The optical device includes a substrate having an electro-optic effect, a modulating optical waveguide formed on a surface layer portion of the substrate and forming an interference optical modulator for modulating input light, and an output optical waveguide and a monitoring optical waveguide each formed on the surface layer portion of the substrate and branched from and connected to a downstream side portion of the modulating optical waveguide. The monitoring optical waveguide guides light for monitoring optical modulation operation of the modulating optical waveguide. The monitoring optical waveguide has a reduced width region which has a reduced waveguide width.
摘要翻译：公开了抑制作为输出信号光与监视光之间的相位关系的偏差的偏移偏移的光学装置。光学装置包括具有电光效应的基板，形成在基板的表面层部分上并形成用于调制输入光的干涉光调制器的调制光波导，以及形成在其上的输出光波导和监视光波导衬底的表层部分并且分支并连接到调制光波导的下游侧部分。监视光波导引导用于监视调制光波导的光调制操作的光。监控光波导具有减小的波导宽度的减小的宽度区域。

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