公开(公告)号：US07116907B1

公开(公告)日：2006-10-03

申请号：US09248103

申请日：1999-02-11

申请人： Tadao Nakazawa ,  Hiroshi Onaka ,  Minoru Seino

发明人： Tadao Nakazawa ,  Hiroshi Onaka ,  Minoru Seino

IPC分类号： H04B10/00

CPC分类号： G02F1/113 ,  G02F1/116 ,  G02F1/125 ,  G02F2201/16 ,  G02F2202/20

摘要： A configuration of acousto-optical tunable filters (AOTF) having stable output characteristics so that the output does not significantly vary with time. The configuration includes a plurality of AOTFs cascaded together. Each AOTF generates a surface acoustic wave in an optical waveguide in accordance with RF signals applied to the AOTF. A phase of a beat generated by the RF signals applied to one of the plurality of AOTFs is different from a phase of a beat generated by the RF signals applied to a different AOTF of the plurality of AOTFs.

摘要翻译： 具有稳定输出特性的声光可调滤波器（AOTF）的配置，使得输出不随时间显着变化。 该配置包括多个级联在一起的AOTF。 每个AOTF根据施加到AOTF的RF信号在光波导中产生声表面波。 由施加到多个AOTF中的一个的RF信号产生的拍子的相位与由施加到多个AOTF的不同AOTF的RF信号产生的拍子的相位不同。

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.

公开(公告)号：US06370308B1

公开(公告)日：2002-04-09

申请号：US09106260

申请日：1998-06-29

申请人： Tadao Nakazawa ,  Minoru Seino ,  Shinji Taniguchi

发明人： Tadao Nakazawa ,  Minoru Seino ,  Shinji Taniguchi

IPC分类号： G02B612

CPC分类号： G02F1/125 ,  G02F2201/07

摘要： An acousto-optical device includes a light waveguide path formed on an acousto-optical substrate, a transducer which crosses the light waveguide path and propagates a surface acoustic wave along the light waveguide path, and a buffer layer provided so that finger electrodes of the transducer are spaced apart from the light waveguide path in crossing portions in which the finger electrodes cross the light waveguide path. The finger electrodes have other portions which directly contact the substrate.

摘要翻译： 声光装置包括形成在声光基板上的光波导路径，穿过光波导路径并沿着光波导路径传播表面声波的换能器，以及设置成使得换能器的指状电极 在手指电极穿过光波导路径的交叉部分中与光波导路径间隔开。 手指电极具有直接接触衬底的其它部分。

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.

公开(公告)号：US06400881B1

公开(公告)日：2002-06-04

申请号：US09118936

申请日：1998-07-20

申请人： Minoru Seino ,  Tadao Nakazawa ,  Shinji Taniguchi

发明人： Minoru Seino ,  Tadao Nakazawa ,  Shinji Taniguchi

IPC分类号： G02B600

CPC分类号： G02F1/125 ,  G02B6/125 ,  G02F2001/0142 ,  G02F2001/212 ,  G02F2203/055

摘要： An optical device has a substrate, a polarization beam splitter, first and second pairs of optical waveguides, a transducer and a thin film. The polarization beam splitter is formed on the substrate and has input and output sides. The first and second pairs of optical waveguides are formed on the substrate to guide polarized optical signals. The first pair of optical waveguides meets at the input side of the polarization beam splitter, and the second pair of optical waveguides meets at the output side of the polarization beam splitter. The transducer is formed of a comb-tooth electrode on the substrate to excite a surface acoustic wave on the substrate and rotate the polarization of the optical signal. The thin film covers a portion of each waveguide of either the first or second pairs of optical waveguides. The thin film may be formed of silicon dioxide or indium dioxide, either with a metal oxide optionally added thereto. The speed of sound in the thin film is less than that in the substrate. The thin film is formed of a material which is transparent to the optical signal. The thin film has a refractive index smaller than that of the optical waveguides.

摘要翻译： 光学器件具有衬底，偏振分束器，第一和第二对光波导，换能器和薄膜。 偏振分束器形成在基板上并具有输入和输出侧。 第一和第二对光波导形成在基板上以引导偏振光信号。 第一对光波导在偏振分束器的输入侧相交，第二对光波导在偏振分束器的输出侧相交。 传感器由基板上的梳齿电极形成，以激发基板上的声表面波，并旋转光信号的极化。 薄膜覆盖第一或第二对光波导对的每个波导的一部分。 薄膜可以由二氧化硅或二氧化铟形成，或者与任选地添加的金属氧化物形成。 薄膜中的声音速度小于衬底中的声速。 薄膜由对光信号透明的材料形成。 薄膜的折射率小于光波导的折射率。

公开(公告)号：US5680497A

公开(公告)日：1997-10-21

申请号：US350894

申请日：1994-12-07

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 ,  G02B6/10

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。

公开(公告)号：US5214724A

公开(公告)日：1993-05-25

申请号：US661602

申请日：1991-02-28

申请人： Minoru Seino ,  Naoyuki Mekada ,  Tadao Nakazawa ,  Yoshinobu Kubota ,  Masaharu Doi

发明人： Minoru Seino ,  Naoyuki Mekada ,  Tadao Nakazawa ,  Yoshinobu Kubota ,  Masaharu Doi

IPC分类号： G02B6/12 ,  G02F1/035 ,  G02F1/21 ,  G02F1/225

CPC分类号： G02F1/035 ,  G02F1/225 ,  G02F1/21 ,  G02F1/2255 ,  G02F2201/066 ,  G02F2203/21

摘要： An optical waveguide device includes an optical waveguide formed on a surface of a substrate having an electrooptical effect, and a pair of electrodes formed on corresponding regions above the optical waveguide and receiving a driving electric signal thereacross. By applying the electric signal to the electrodes, an electric field is formed in a vicinity of the optical waveguide. By changing a distribution of the electric field in accordance with a change in a frequency of the electric signal, it is possible to suppress a DC drift of the device to effectively compensate a fluctuation in operational characteristics due to the DC drift, stress of the like.

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。

公开(公告)号：US07362925B2

公开(公告)日：2008-04-22

申请号：US11144607

申请日：2005-06-06

申请人： Hideyuki Miyata ,  Hiroshi Onaka ,  Tadao Nakazawa ,  Yutaka Kai ,  Hiroshi Miyata ,  Yoichi Takasu ,  Naoki Hashimoto

发明人： Hideyuki Miyata ,  Hiroshi Onaka ,  Tadao Nakazawa ,  Yutaka Kai ,  Hiroshi Miyata ,  Yoichi Takasu ,  Naoki Hashimoto

IPC分类号： G02F1/1335

CPC分类号： H04J14/0221 ,  G02F1/0121 ,  G02F2203/585 ,  H04B10/0795 ,  H04B10/07953 ,  H04B10/0797

摘要： The present invention aims at providing a control method and a control apparatus for controlling the operation setting of an optical device with high accuracy, so as to reliably obtain characteristics according to a desired relationship to be set corresponding to a signal light, immediately after the control start. To this end, the control apparatus of the present invention comprises an optical coupler that branches a part of a main signal light input to the optical device, a monitoring optical device that operates in accordance with a control parameter same as for the optical device, and processes the monitor light branched by the optical coupler, a light receiver that receives the monitor light processed by the monitoring optical device, a detecting circuit that detects a relationship between the monitor light received by the light receiver, and the wavelength or optical power of the signal light, and a controlling circuit that adjust the control parameter for the optical device to control the operation setting, based on the relationship detected by the detecting circuit, so that characteristics of the optical device become capable of realizing the relationship to be set corresponding to the signal light.

摘要翻译： 本发明旨在提供一种用于高精度地控制光学装置的操作设置的控制方法和控制装置，以便在控制之后立即根据与信号光对应的期望关系可靠地获得特性 开始。 为此，本发明的控制装置包括将输入到光学装置的主信号光的一部分分支的光耦合器，根据与光学装置相同的控制参数进行操作的监视光学装置，以及 处理由光耦合器分支的监视光，接收由监视光学装置处理的监视光的光接收器，检测由光接收器接收的监视光之间的关系的检测电路以及光接收器的波长或光功率 信号灯，以及控制电路，其根据由检测电路检测到的关系调整光学装置的控制参数以控制操作设置，使得光学装置的特性变得能够实现与 信号灯。

公开(公告)号：US06934433B2

公开(公告)日：2005-08-23

申请号：US10106315

申请日：2002-03-27

申请人： Hideyuki Miyata ,  Hiroshi Onaka ,  Tadao Nakazawa ,  Yutaka Kai ,  Hiroshi Miyata ,  Yoichi Takasu ,  Naoki Hashimoto

发明人： Hideyuki Miyata ,  Hiroshi Onaka ,  Tadao Nakazawa ,  Yutaka Kai ,  Hiroshi Miyata ,  Yoichi Takasu ,  Naoki Hashimoto

IPC分类号： G02B6/30 ,  G02B5/30 ,  G02B6/12 ,  G02B6/122 ,  G02F1/01 ,  G02F1/11 ,  G02F1/125 ,  G02F1/31 ,  H04J14/02 ,  G02B6/26

CPC分类号： H04J14/0221 ,  G02F1/0121 ,  G02F2203/585 ,  H04B10/0795 ,  H04B10/07953 ,  H04B10/0797

摘要： The present invention aims at providing a control method and a control apparatus for controlling the operation setting of an optical device with high accuracy, so as to reliably obtain characteristics according to a desired relationship to be set corresponding to a signal light, immediately after the control start. To this end, the control apparatus of the present invention comprises an optical coupler that branches a part of a main signal light input to the optical device, a monitoring optical device that operates in accordance with a control parameter same as for the optical device, and processes the monitor light branched by the optical coupler, a light receiver that receives the monitor light processed by the monitoring optical device, a detecting circuit that detects a relationship between the monitor light received by the light receiver, and the wavelength or optical power of the signal light, and a controlling circuit that adjust the control parameter for the optical device to control the operation setting, based on the relationship detected by the detecting circuit, so that characteristics of the optical device become capable of realizing the relationship to be set corresponding to the signal light.

摘要翻译： 本发明旨在提供一种用于高精度地控制光学装置的操作设置的控制方法和控制装置，以便在控制之后立即根据与信号光对应的期望关系可靠地获得特性 开始。 为此，本发明的控制装置包括将输入到光学装置的主信号光的一部分分支的光耦合器，根据与光学装置相同的控制参数进行操作的监视光学装置，以及 处理由光耦合器分支的监视光，接收由监视光学装置处理的监视光的光接收器，检测由光接收器接收的监视光之间的关系的检测电路以及光接收器的波长或光功率 信号灯，以及控制电路，其根据由检测电路检测到的关系调整光学装置的控制参数以控制操作设置，使得光学装置的特性变得能够实现与 信号灯。