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    Pn junction optical modulating device having a buffer layer with small energy gap
    43.
    发明授权
    Pn junction optical modulating device having a buffer layer with small energy gap 失效
    具有具有小能隙的缓冲层的Pn结光调制装置

    公开(公告)号：US4991921A

    公开(公告)日：1991-02-12

    申请号：US442521

    申请日：1989-11-27

    申请人： Masatoshi Suzuki ,  Hideaki Tanaka ,  Shigeyuki Akiba ,  Yuichi Matsushima

    发明人： Masatoshi Suzuki ,  Hideaki Tanaka ,  Shigeyuki Akiba ,  Yuichi Matsushima

    IPC分类号： G02F1/015 ,  G02F1/025

    CPC分类号： G02F1/025 ,  G02F2001/0157

    摘要： An optical modulating device is disclosed which has, on a substrate directly or via a lower cladding layer, an optical waveguide layer, an upper cladding layer of a refractive index smaller than that of the optical waveguide layer and a pair of electrodes for applying an electric field across the substrate and the upper cladding layer and in which the absorption coefficient for incident light of a fixed intensity incident to the optical waveguide layer is varied by the electric field applied across the pair of electrodes to perform the modulation of the light and the modulated light is emitted from a light emitting end face of the optical waveguide layer. In accordance with the present invention, a pn junction is formed in the upper cladding layer and at least one buffer layer of an energy gap smaller than that of the upper cladding layer but larger than that of the optical waveguide layer is interposed between the upper cladding layer and the optical waveguide layer.

    摘要翻译： 公开了一种光学调制装置，其在衬底上直接或经由下包层，光波导层，折射率小于光波导层的折射率的上包层和用于施加电的一对电极 并且其中入射到光波导层的固定强度的入射光的吸收系数由施加在该对电极上的电场而变化，以执行光的调制和被调制的 光从光波导层的发光端面发射。 根据本发明，在上部包层中形成pn结，并且至少一个能量间隙的缓冲层比上部包覆层的能隙小，但是比光波导层大的缓冲层插入在上部包层 层和光波导层。

    Optical modulation element
    44.
    发明授权
    Optical modulation element 失效
    光调制元件

    公开(公告)号：US4946243A

    公开(公告)日：1990-08-07

    申请号：US387511

    申请日：1989-07-28

    申请人： Masatoshi Suzuki ,  Shigeyuki Akiba ,  Hideaki Tanaka ,  Katsuyuki Utaka

    发明人： Masatoshi Suzuki ,  Shigeyuki Akiba ,  Hideaki Tanaka ,  Katsuyuki Utaka

    IPC分类号： G02B6/12 ,  G02F1/015 ,  G02F1/025 ,  H01L31/14 ,  H03C1/34

    CPC分类号： G02F1/025 ,  G02F2001/0157

    摘要： An optical modulation element is disclosed which has, on a substrate directly or through a lower clad layer, an optical waveguide layer of a low impurity concentration, an upper clad layer of a refractive index smaller than that of the optical waveguide layer, and electrodes, and in which light of a constant intensity incident on a light incident end face of the optical waveguide layer is intensity-modulated by changing the absorption coefficient of the optical waveguide layer by means of an electric field applied thereto across the electrodes so that the thus modulated light is emitted from a light emitting end face of the optical waveguide layer. In accordance with the present invention, a plurality of low impurity concentration regions and a plurality of high impurity concentration regions are disposed alternately with each other in contact with at least one of the lower and upper clad layers in the direction of travel of light in such a manner that the distribution density of the plurality of high impurity concentration regions increases in the direction of travel of light.

    Optical short pulse generating device
    47.
    发明授权
    Optical short pulse generating device 失效
    光短脉冲发生装置

    公开(公告)号：US5434693A

    公开(公告)日：1995-07-18

    申请号：US213928

    申请日：1994-03-16

    申请人： Hideaki Tanaka ,  Satoru Takagi ,  Masatoshi Suzuki ,  Yuichi Matsushima

    发明人： Hideaki Tanaka ,  Satoru Takagi ,  Masatoshi Suzuki ,  Yuichi Matsushima

    IPC分类号： G02F1/01 ,  G02F1/015 ,  H04B10/25 ,  H04B10/2507 ,  H04B10/508 ,  H04B10/54 ,  H04B10/588 ,  H04B10/80 ,  H04B10/04

    CPC分类号： H04B10/50 ,  G02F1/0121 ,  G02F1/015 ,  G02F2001/0157 ,  G02F2203/26 ,  G02F2203/54

    摘要： An optical short pulse generating device is disclosed, in which semiconductor laser light of a fixed intensity is launched into a first semiconductor electroabsorption optical modulator which is driven by a 0V or forward bias voltage and a sinusoidal voltage, and the output light from the first optical modulator is launched into a second electroabsorption optical modulator to which is applied a bias voltage and a sinusoidal voltage having delayed from the said sinusoidal voltage for a period of time corresponding to the phase reversal thereof, whereby it is possible to generate optical short pulses of a repetition frequency twice higher than the oscillation frequency of a sinusoidal voltage generator.

    摘要翻译： 公开了一种光学短脉冲发生装置，其中将固定强度的半导体激光发射到由0V或正向偏压和正弦电压驱动的第一半导体电吸收光调制器中，并且来自第一光学器件的输出光 调制器被发射到第二电吸收光学调制器中，在该第二电吸收光学调制器中施加偏压和正弦电压，该偏压和正弦电压具有与所述正弦电压相比延迟一段与其相反相对应的时间，由此可以产生 重复频率比正弦电压发生器的振荡频率高两倍。

    Optical modulation device
    48.
    发明授权
    Optical modulation device 失效
    光调制装置

    公开(公告)号：US4913506A

    公开(公告)日：1990-04-03

    申请号：US311218

    申请日：1989-02-16

    申请人： Masatoshi Suzuki ,  Shigeyuki Akiba ,  Hideaki Tanaka ,  Katsuyuki Utaka

    发明人： Masatoshi Suzuki ,  Shigeyuki Akiba ,  Hideaki Tanaka ,  Katsuyuki Utaka

    IPC分类号： G02F1/015 ,  G02F1/017 ,  G02F1/025 ,  G02B6/10

    CPC分类号： B82Y20/00 ,  G02F1/01708 ,  G02F1/025 ,  G02F2001/0157 ,  G02F2202/101 ,  G02F2202/102

    摘要： An optical modulation device is disclosed in which a difference between the photon energy of incident light and the band-gap energy of the modulation waveguide layer is set to a value greater than 50 meV to thereby suppress the degradation of the modulation voltage and the modulation band width which is caused by an increase in the intensity of incident light and in that the optical modulation device is formed in a predetermined length to thereby decrease the modulation voltage. The energy gap of the optical waveguide layer of the optical modulation device is varied continuously or discontinuously in the direction of its thickness to provide a constant absorption coefficient thickwise of the optical waveguide layer so that the electric field intensity distribution in the optical waveguide layer is compensated for, by which overlap of the light distribution and the absorption coefficient is increased so as to decrease the modulation voltage and broaden the modulation band by the reduction of the length of the device. The composition, thickness and stripe width of the optical waveguide layer are changed so that its absorption coefficient increases from the light receiving end face of the optical waveguide layer toward its light emitting end face, thereby making the number of carriers absorbed per unit length substantially constant in the direction of travel of light.

    摘要翻译： 公开了一种光调制装置，其中将入射光的光子能量与调制波导层的带隙能量之间的差设定为大于50meV的值，从而抑制调制电压和调制带的劣化 由入射光强度的增加引起的宽度，并且光调制装置形成为预定长度，从而降低调制电压。 光调制装置的光波导层的能隙在其厚度方向上连续或不连续地变化，以提供光波导层厚度的恒定吸收系数，使得光波导层中的电场强度分布得到补偿 由此，增加了光分布和吸收系数的重叠，从而降低了调制电压，并且通过减小器件的长度来扩大调制频带。 改变光波导层的组成，厚度和条纹宽度，使得其吸收系数从光波导层的光接收端面向其发光端面增加，从而使每单位长度吸收的载流子基本恒定 在光的行进方向。

    Protection path reservation method and node unit
    49.
    发明授权
    Protection path reservation method and node unit 有权
    保护路径预留方法和节点单元

    公开(公告)号：US08619551B2

    公开(公告)日：2013-12-31

    申请号：US11651493

    申请日：2007-01-10

    申请人： Masatoshi Suzuki ,  Hiroyuki Ibe ,  Tazuko Tomioka ,  Kyosuke Dobashi ,  Hiroyuki Inamura

    发明人： Masatoshi Suzuki ,  Hiroyuki Ibe ,  Tazuko Tomioka ,  Kyosuke Dobashi ,  Hiroyuki Inamura

    IPC分类号： G01R31/08 ,  G06F15/173 ,  G02F1/00

    CPC分类号： H04L45/22 ,  H04L45/28 ,  H04L47/70 ,  H04L47/724 ,  H04L47/728 ,  H04L47/746 ,  H04L47/829 ,  H04Q11/0062 ,  H04Q2011/0073 ,  H04Q2011/0081

    摘要： A protection path reservation method which reserves protection paths to avoid a node failure for each transmission path on a network formed of a plurality of nodes, comprising assuming the nodes as an imaginary failure node in turn in a condition in which the node failure is not present in the network, and selecting N neighbor nodes connected to the imaginary failure node through N links, wherein the imaginary failure nodes sequentially transmit protection path reservation request messages to neighbor nodes, and the nodes which have received the protection path reservation request messages sequentially, one by one, reserve N−1 protection paths starting from the nodes.

    摘要翻译： 一种保护路径预留方法，其保留保护路径以避免由多个节点形成的网络上的每个传输路径的节点故障，包括在不存在节点故障的情况下依次假设节点为虚设故障节点 并且通过N个链路选择连接到虚拟故障节点的N个相邻节点，其中虚拟故障节点顺序地向相邻节点发送保护路径预留请求消息，并且已经接收到保护路径预留请求消息的节点顺序地发送 从节点开始，保留N-1个保护路径。

    Image pickup apparatus for performing a desirable self timer shooting and an automatic shooting method using the same
    50.
    发明授权
    Image pickup apparatus for performing a desirable self timer shooting and an automatic shooting method using the same 有权
    用于执行期望的自拍定时拍摄的图像拾取装置和使用其的自动拍摄方法

    公开(公告)号：US08194140B2

    公开(公告)日：2012-06-05

    申请号：US12211520

    申请日：2008-09-16

    申请人： Masatoshi Suzuki

    发明人： Masatoshi Suzuki

    IPC分类号： G03B17/40 ,  H04N5/235

    CPC分类号： G03B17/40 ,  G03B13/36 ,  H04N5/232 ,  H04N5/23219 ,  H04N5/23222

    摘要： An image pickup apparatus includes a system controller and a face detector, and can register face data of a photographer for a self-timer shooting mode in advance. In the self-timer shooting mode, the face detector extracts face data of people in a subject field from an image signal. When the system controller determines, on the basis of the extracted face data and the registered face data, that the photographer can be detected, the apparatus starts countdown for automatic shooting. Consequently, the apparatus can pick up an image of the photographer without fail, and the photographer can securely strike a pose within the countdown period of time. Furthermore, the apparatus can determine the countdown period of time optionally, thereby enabling the self-timer shooting to be executed depending on the personality of the photographer.

    摘要翻译： 图像拾取装置包括系统控制器和面部检测器，并且可以预先登记摄像机的面部数据以进行自拍拍摄模式。 在自拍拍摄模式中，面部检测器从图像信号中提取被摄体区域中的人物的面部数据。 当系统控制器基于所提取的面部数据和登记的面部数据确定可以检测摄影者时，该设备开始自动拍摄的倒计时。 因此，该装置可以拾取摄影者的图像而不会失败，摄影者可以在倒计时期间内安全地拍摄姿势。 此外，该装置可以任选地确定倒计时周期，从而可以根据拍摄者的个性执行自拍定时拍摄。