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。

公开(公告)号：US06741378B2

公开(公告)日：2004-05-25

申请号：US10285419

申请日：2002-11-01

申请人： Masaki Sugiyama ,  Masaharu Doi ,  Tadao Nakazawa

发明人： Masaki Sugiyama ,  Masaharu Doi ,  Tadao Nakazawa

IPC分类号： G02F103

CPC分类号： G02F1/0356 ,  G02F1/2255 ,  G02F2201/127

摘要： A low voltage modulation signal can be realized while reducing reflection and radiation of a high frequency modulation signal in an optical modulator. The optical modulator includes an electrooptic effect element, a relay substrate constituted of a dielectric wafer on which a coplanar waveguide, and a connector supplying a modulation signal of microwave band to the electrooptic effect element, wherein, when the modulation signal includes a component of 30 GHz, a pad space between the signal electrode pad and the ground electrode pad of the electrooptic effect element is defined as S &mgr;m, and a pad height is defined as H &mgr;m, the pad height is no greater than 300 &mgr;m and the relation is set as −0.002H2+1.3H−160

摘要翻译： 可以在减少光调制器中的高频调制信号的反射和辐射的同时实现低电压调制信号。 光调制器包括电光效应元件，由其上共面波导的介质晶片构成的继电器基板和向电光效应元件提供微波波段的调制信号的连接器，其中当调制信号包括30 GHz，电光效应元件的信号电极焊盘和接地电极焊盘之间的焊盘空间被定义为S mum，焊盘高度被定义为H mum，焊盘高度不大于300μm，并且设置关系 如

公开(公告)号：US06728487B2

公开(公告)日：2004-04-27

申请号：US09755041

申请日：2001-01-08

申请人： Tadao Nakazawa

发明人： Tadao Nakazawa

IPC分类号： H04J1402

CPC分类号： G02F1/116 ,  G02F2201/16 ,  H04J14/0209 ,  H04J14/021 ,  H04J14/0213

摘要： An AOTF drive method for driving a plurality of AOTFs connected in tandem comprises: separating a plurality of RF signals in advance into a plurality of groups; batch-branching the RF signals of each group in accordance with the number of steps of the AOTFS; and batch-adjusting the phases of the individual branched RF signals. As a result, this makes it possible to reduce the number of phase shifters compared to the prior art while maintaining the effectiveness of suppressing beats in the AOTFs.

摘要翻译： 用于驱动串联连接的多个AOTF的AOTF驱动方法包括：将多个RF信号预先分离成多个组; 根据AOTFS的步骤数量对每组的RF信号进行批量分支; 并批量调整各个分支RF信号的相位。 结果，与现有技术相比，可以减少移相器的数量，同时保持抑制AOTF中的节拍的效果。

公开(公告)号：US06701031B2

公开(公告)日：2004-03-02

申请号：US09915589

申请日：2001-07-27

申请人： Tadao Nakazawa

发明人： Tadao Nakazawa

IPC分类号： G02F1335

CPC分类号： G02F1/116 ,  G02F1/225 ,  G02F2203/585 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0213

摘要： An acousto-optical tunable filter capable of appropriately filtering lights with a plurality of frequencies, a method of driving the same, and an optical add/drop multiplexer using the same. The acousto-optical tunable filter includes a signal source which supplies an RF frequency to the acousto-optical tunable filter; a control part which controls the RF frequency of the signal source; and a compensation part which determines an RF frequency for selecting one light from a plurality of lights with different frequencies from each other by adding/subtracting a predetermined compensation amount to/from an RF frequency for selecting only one light, when selecting the plurality of lights in the acousto-optical tunable filter, determines all of a plurality of RF frequencies for selecting the plurality of lights, and designates the control part to oscillate the determined RF frequencies.

摘要翻译： 能够适当地过滤多个频率的光的声光可调滤波器，其驱动方法以及使用其的光分插复用器。 声光可调谐滤波器包括将RF频率提供给声光可调谐滤波器的信号源; 控制部，其控制信号源的RF频率; 以及补偿部，其通过在选择所述多个灯的情况下，对来自/从用于选择一个光的RF频率添加/减去预定的补偿量来确定用于从具有不同频率的多个光中选择一个光的RF频率 在声光可调谐滤波器中，确定用于选择多个光的多个RF频率的全部，并且指定控制部分来振荡所确定的RF频率。

公开(公告)号：US06594069B1

公开(公告)日：2003-07-15

申请号：US10106783

申请日：2002-03-27

申请人： Tadao Nakazawa ,  Hideyuki Miyata

发明人： Tadao Nakazawa ,  Hideyuki Miyata

IPC分类号： G02F129

CPC分类号： H04J14/0209 ,  G02F1/116 ,  H04J14/021 ,  H04J14/0219

摘要： The present invention aims at providing a control method and a control apparatus for controlling variable selected wavelengths at respective stages with high accuracy and reliability, to obtain desired wavelength characteristics, in a multi-staged band rejection type optical wavelength variable filter. To this end, the optical wavelength variable filter in the present invention has wavelength characteristics formed with a blocking band including a wavelength width according to a deviation amount obtained by deviating respective selected wavelengths from one another of a plurality of optical filter sections that are cascade connected, and the control apparatus for controlling the wavelength characteristics of this optical wavelength variable filter comprises a dropped light monitoring section that takes out to monitor a dropped light to be blocked from passing through at the optical filter section corresponding to the selected wavelength most closest to the center wavelength of the blocking band, among the plurality of selected wavelengths; and a selected wavelength controlling section that adjusts the respective selected wavelengths based on a peak wavelength of the dropped light.

摘要翻译： 本发明的目的在于提供一种控制方法和控制装置，用于在多级带阻抗型光波长可变滤波器中以高精度和可靠性在各个级别控制可变选择波长以获得期望的波长特性。 为此，本发明中的光波长可变滤波器具有波长特性，该波长特性形成有阻挡带，该阻挡带包括波长宽度，该波长宽度根据通过级联连接的多个滤光器部分中的各个选定波长偏离而获得的偏移量 并且用于控制该光波长可变滤波器的波长特性的控制装置包括一个下落光监测部分，该光束监测部分取出以监测被遮挡的光线在对应于最接近 在多个选择的波长中的阻挡带的中心波长; 以及选择的波长控制部，其根据落下的光的峰值波长来调整各选择的波长。

公开(公告)号：US06549328B2

公开(公告)日：2003-04-15

申请号：US10098497

申请日：2002-03-18

申请人： Shinichi Aoki ,  Tadao Nakazawa

发明人： Shinichi Aoki ,  Tadao Nakazawa

IPC分类号： G02F133

CPC分类号： G02F1/125

摘要： An object of the invention is to provide an acousto-optic tunable filter (AOTF) that realizes filter characteristics where the wavelength characteristics in the vicinity of a selected center wavelength are smooth, and the bandwidth thereof is sufficiently narrow. To this end, an AOTF of the invention has a construction where a mode coupling section and a wavelength characteristic flattening section provided with an optical filter configuration for selecting an optical signal based on mode conversion using the acousto-optic effect, are respectively connected via a mode branching device. The mode coupling section mode converts an optical signal corresponding to a selected wavelength, and the wavelength characteristic flattening section again mode converts only the optical component of a part of the selected optical signal mode converted in the mode coupling section in the vicinity of a center wavelength thereof. The optical component that has not been subjected to second mode conversion in the wavelength characteristic flattening section is branched and output by a mode branching device connected to the output side of the wavelength characteristic flattening section, to thereby perform flattening of the wavelength characteristics of the selected optical signal in the vicinity of the center wavelength.

摘要翻译： 本发明的目的是提供一种实现滤波器特性的声光可调滤波器（AOTF），其中所选择的中心波长附近的波长特性是平滑的，并且其带宽足够窄。 为此，本发明的AOTF具有这样的结构，其中模式耦合部分和具有用于基于使用声光效应的模式转换来选择光信号的滤光器配置的波长特性平坦化部分分别通过 模式分支装置。 模式耦合部分模式转换对应于所选波长的光信号，并且波长特性平坦化部分再次模式仅将模式耦合部分中转换的所选择的光信号模式的一部分的光分量转换为中心波长附近 其中。 在波长特性平坦化部中未进行第二模式转换的光学部件通过与波长特性平坦化部的输出侧连接的模式分支装置分支并输出，从而进行所选择的波长特性的波长特性的平坦化 光信号在中心波长附近。

公开(公告)号：US5404412A

公开(公告)日：1995-04-04

申请号：US996684

申请日：1992-12-24

申请人： Minoru Seino ,  Tadao Nakazawa ,  Takashi Yamane ,  Yoshinobu Kubota ,  Masaharu Doi ,  Kunio Sugeta ,  Teruo Kurahashi

发明人： Minoru Seino ,  Tadao Nakazawa ,  Takashi Yamane ,  Yoshinobu Kubota ,  Masaharu Doi ,  Kunio Sugeta ,  Teruo Kurahashi

IPC分类号： G02B6/12 ,  G02F1/01 ,  G02F1/035 ,  G02B5/174

CPC分类号： G02F1/035 ,  G02F1/0123 ,  G02F2201/07 ,  G02F2203/21

摘要： This invention aims at providing an optical waveguide device capable of stably operating for an extended period of time. The optical waveguide device comprises an optical waveguide path formed inside a surface of an electro-optical substrate, a buffer layer formed on the optical waveguide path, and a driving electrode for impressing an electric field so as to change a refractive index of the optical waveguide path, wherein the buffer layer is made of a transparent dielectric or insulator of a mixture between silicon dioxide and an oxide of at least one element selected from the group consisting of the metal elements of the Groups III to VIII, Ib and IIb of the Periodic Table and semiconductor elements other than silicon, or a transparent dielectric or insulator of an oxide between silicon and at least one of the metal elements and semiconductor elements described above.

摘要翻译： 本发明的目的在于提供能够长时间稳定运行的光波导装置。 光波导装置包括形成在电光基板的表面内的光波导路径，形成在光波导路径上的缓冲层，以及用于施加电场以驱动光波导的折射率的驱动电极 路径，其中所述缓冲层由二氧化硅和至少一种元素的氧化物之间的混合物的透明电介质或绝缘体制成，所述至少一种元素选自元素周期表III-VIII，Ib和IIb族的金属元素 除了硅之外的表格和半导体元件，或硅与至少一个上述金属元件和半导体元件之间的氧化物的透明电介质或绝缘体。