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    Light modulator of waveguide type
    71.
    发明授权
    Light modulator of waveguide type 失效
    波导型光调制器

    公开(公告)号：US06522792B1

    公开(公告)日：2003-02-18

    申请号：US09529223

    申请日：2000-04-10

    Applicant: Tohru Sugamata ,  Yasuyuki Miyama ,  Yoshihiro Hashimoto

    Inventor： Tohru Sugamata ,  Yasuyuki Miyama ,  Yoshihiro Hashimoto

    IPC: G02F1035

    CPC classification number: G02F1/0356 ,  G02F2201/066 ,  G02F2201/07

    Abstract: An optical waveguide modulator 40 has a substrate 1 made of a material with an electrooptic effect, an optical waveguide 2 to guide a lightwave 2, a travelling wave-type signal electrode 3 and the ground electrodes 4 to control the lightwave. Moreover, it has a buffer layer 6, at least a part thereof being embedded in the superficial layer of the substrate 1, having a larger width “W” than a width “&ohgr;” of the travelling wave-type signal electrode 3 only under the signal electrode 3 and its nearby part.

    Abstract translation: 光波导调制器40具有由具有电光效应的材料制成的基板1，引导光波2的光波导2，行波型信号电极3和接地电极4以控制光波。 此外，其具有缓冲层6，其至少一部分嵌入在基板1的表层中，具有比行波信号电极3的宽度“ω”更大的宽度“W”，仅在 信号电极3及其附近部分。

    Mach-Zehnder optical modulator
    73.
    发明申请
    Mach-Zehnder optical modulator 审中-公开
    马赫 - 曾德尔光学调制器

    公开(公告)号：US20020159128A1

    公开(公告)日：2002-10-31

    申请号：US10131706

    申请日：2002-04-24

    Applicant: JDS Uniphase Corporation

    Inventor： Malcolm Green

    IPC: G02F001/03 ,  G02F001/07

    CPC classification number: G02F1/225 ,  G02F2201/07 ,  G02F2201/12 ,  G02F2203/21

    Abstract: The present invention relates to a Mach-Zehnder optical modulator having an electrode structure that is arranged to compensate for temperature induced performance degrading variations. The distances between appropriate faces of the signal electrode and a ground electrode and corresponding wave-guide arms are arranged such that there is a more balanced thermal expansion of the waveguide arms due to heating of the waveguides by the RF signals carried on the signal and ground electrodes. Tailored buffer layers further balances the heating in the waveguide arms through the RF losses in the electrodes. The balanced heating reduces the temperature gradient between the waveguide arms of the optical modulator and hence reduces the adverse thermally induced performance degrading variations.

    Abstract translation: 本发明涉及一种具有电极结构的马赫曾德尔光调制器，该电极结构被布置为补偿温度诱导的性能降级变化。 信号电极的适当面与接地电极和对应的波导臂之间的距离被布置成使得波导臂的热膨胀由于信号和地面上携带的RF信号而被波导加热而具有更平衡的热膨胀 电极。 定制的缓冲层通过电极中的RF损耗进一步平衡波导臂中的加热。 平衡加热降低了光学调制器的波导臂之间的温度梯度，从而减少了不利的热诱导性能降级变化。

    Acousto-optical device
    74.
    发明授权
    Acousto-optical device 失效
    声光装置

    公开(公告)号：US06370308B1

    公开(公告)日：2002-04-09

    申请号：US09106260

    申请日：1998-06-29

    Applicant: Tadao Nakazawa ,  Minoru Seino ,  Shinji Taniguchi

    Inventor： Tadao Nakazawa ,  Minoru Seino ,  Shinji Taniguchi

    IPC: G02B612

    CPC classification number: G02F1/125 ,  G02F2201/07

    Abstract: 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.

    Abstract translation: 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。

    Non-linear optical thin film layer system
    75.
    发明授权
    Non-linear optical thin film layer system 失效
    非线性光学薄膜层系统

    公开(公告)号：US5993544A

    公开(公告)日：1999-11-30

    申请号：US50049

    申请日：1998-03-30

    Applicant: Lee A. Knauss ,  Kolagani S. Harshavardhan

    Inventor： Lee A. Knauss ,  Kolagani S. Harshavardhan

    IPC: G02F1/055 ,  G02F1/35 ,  B23B9/00

    CPC classification number: G02F1/0551 ,  G02F1/3501 ,  G02F2001/3505 ,  G02F2201/07 ,  G02F2202/20

    Abstract: A non-linear optical thin film layer system (10) is provided for integrated optics applications where a non-linear optical thin film layer (18) is integrated with a gallium-arsenide substrate (12). A first encapsulating layer (20) is deposited on lower surface (26), peripheral sides (30), and an upper surface peripheral region (28) of said gallium-arsenide substrate (12). A second encapsulating and buffer layer (14) is epitaxially grown on an upper surface of said gallium-arsenide substrate (12) and on the encapsulated upper surface peripheral region (28) of said gallium-arsenide substrate (12). A perovskite layer (16) is epitaxially grown on an upper surface of the layer (14). A non-linear optical thin film layer (18) is epitaxially grown on an upper surface of the perovskite layer (16) and is lattice matched to this layer.

    Abstract translation: 提供非线性光学薄膜层系统（10）用于集成光学应用，其中非线性光学薄膜层（18）与砷化镓衬底（12）集成。 第一封装层（20）沉积在下表面（26），外围边（30）和所述砷化镓基底（12）的上表面周边区域（28）上。 在所述砷化镓衬底（12）的上表面和所述砷化镓衬底（12）的封装的上表面周边区域（28）上外延生长第二封装和缓冲层（14）。 在层（14）的上表面上外延生长钙钛矿层（16）。 在钙钛矿层（16）的上表面外延生长非线性光学薄膜层（18），并且与该层晶格匹配。

    Electro-optical waveguide element with reduced DC drift phenomena
    76.
    发明授权
    Electro-optical waveguide element with reduced DC drift phenomena 失效
    具有降低的DC漂移现象的电光波导元件

    公开(公告)号：US5878175A

    公开(公告)日：1999-03-02

    申请号：US701055

    申请日：1996-08-21

    Applicant: Shinichiro Sonoda ,  Masami Hatori

    Inventor： Shinichiro Sonoda ,  Masami Hatori

    IPC: G02F1/035 ,  G02F1/295

    CPC classification number: G02F1/035 ,  G02F2201/07 ,  G02F2201/302 ,  G02F2203/21

    Abstract: An electro-optical waveguide element with reduced DC drift phenomena is presented. The waveguide element is made up of an optical waveguide formed on a substrate possessing electro-optical effects, at least a pair of electrodes closely attached to the optical waveguide with a buffer layer sandwiched between the substrate and the electrodes, and a driver circuit for applying a voltage between the electrodes. The buffer layer is made of a material having a dielectric constant in the range of 20-1000. The buffer layer is more preferably made of a material having a dielectric constant in the range of 20-200. The material of the buffer layer is selected from the group consisting of HfO.sub.2, TiO.sub.2, SrTiO.sub.3, BaTiO.sub.3, LiNbO.sub.3, LiTaO.sub.3, Pb(Zr, Ti)O.sub.3, and (Pb, La)(Zr, Ti)O.sub.3.

    Abstract translation: 提出了具有降低的DC漂移现象的电光波导元件。 波导元件由形成在具有电光效应的基板上的光波导构成，至少一对电极与光波导紧密连接，缓冲层夹在基板和电极之间，驱动电路用于施加 电极之间的电压。 缓冲层由介电常数在20-1000范围内的材料制成。 缓冲层更优选由介电常数在20-200范围内的材料制成。 缓冲层的材料选自HfO 2，TiO 2，SrTiO 3，BaTiO 3，LiNbO 3，LiTaO 3，Pb（Zr，Ti）O 3和（Pb，La）（Zr，Ti）O 3。

    Waveguide type electro-optical element comprising material having specific resistance ranging between 107-1011 omega CM
    77.
    发明授权
    Waveguide type electro-optical element comprising material having specific resistance ranging between 107-1011 omega CM 失效
    波导型电光元件包括具有107-1011Ω·cm的电阻率的材料

    公开(公告)号：US5566258A

    公开(公告)日：1996-10-15

    申请号：US487517

    申请日：1995-06-07

    Applicant: Masami Hatori ,  Takashi Yamada ,  Shinichiro Sonoda

    Inventor： Masami Hatori ,  Takashi Yamada ,  Shinichiro Sonoda

    IPC: G02F1/035 ,  G02F1/295 ,  G02B6/10

    CPC classification number: G02F1/035 ,  G02F2201/07 ,  G02F2203/21

    Abstract: A waveguide type electro-optical element is made up of a proton-exchanged optical waveguide formed on a substrate which possesses an electro-optical effect. At least one pair of electrodes is formed on the substrate adjacent to the optical waveguide with a buffer layer being disposed between the substrate and the electrodes. A guide beam propagating through the waveguide is diffracted as a result of the application of a voltage to the electrodes. The buffer layer is made of material which has a specific resistance ranging between 10.sup.7 -10.sup.11 .OMEGA.cm. The optical waveguide may be of a form having a split-type optical waveguide consisting of the combination of two Y-shaped waveguides, and a pair of channel optical waveguides constituting a directional coupler.

    Abstract translation: 波导型电光元件由形成在具有电光效应的基板上的质子交换光波导构成。 在与光波导相邻的衬底上形成至少一对电极，其中缓冲层设置在衬底和电极之间。 作为向电极施加电压的结果，传播通过波导的引导光束被衍射。 缓冲层由具有107-1011欧姆·厘米之间的电阻率的材料制成。 光波导可以是具有由两个Y形波导的组合组成的分裂型光波导和构成定向耦合器的一对沟道光波导的形式。

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