公开(公告)号：US5138482A

公开(公告)日：1992-08-11

申请号：US588122

申请日：1990-09-25

申请人： Masami Hatori ,  Hiroshi Sunagawa

发明人： Masami Hatori ,  Hiroshi Sunagawa

IPC分类号： G02F1/11 ,  G02F1/335 ,  G11B7/12

CPC分类号： G02F1/113 ,  G11B7/1245 ,  G02F1/335

摘要： A light modulator includes an interdigital transducer having a plurality of interdigital electrode fingers for generating surface elastic waves having respective different frequencies in an optical waveguide. The electrode fingers are oriented in different directions to enable the generated surface elastic waves to diffract a light beam guided through the optical waveguide, while satisfying the Bragg condition for diffraction. A driver applies high-frequency voltages having respective frequencies to the electrode fingers to generate the surface elastic waves, respectively. The application of the high-frequency voltages to the electrode fingers is turned on and off by switching circuits. The light modulator is incorporated in a recording device.

摘要翻译： 光调制器包括具有多个叉指电极指的叉指换能器，用于在光波导中产生具有各自不同频率的表面弹性波。 电极指沿不同方向取向，使得所产生的表面弹性波衍射通过光波导引导的光束，同时满足用于衍射的布拉格条件。 驱动器将具有各自频率的高频电压分别施加到电极指以产生表面弹性波。 通过开关电路使高频电压施加到电极指状物上。 光调制器结合在记录装置中。

公开(公告)号：US5083856A

公开(公告)日：1992-01-28

申请号：US587912

申请日：1990-09-25

申请人： Masami Hatori ,  Hiroshi Sunagawa

发明人： Masami Hatori ,  Hiroshi Sunagawa

IPC分类号： G02B6/12 ,  G02F1/335

CPC分类号： G02F1/335

摘要： A light beam is introduced into an optical waveguide on a substrate of LiNbO.sub.3, and diffracted by a surface elastic wave generated by a tilted-finger chirped interdigital transducer on the optical waveguide. The direction in which the light beam is guided through the optical waveguide is substantially aligned with the z-axis of the LiNbO.sub.3 substrate. The light beam diffracted by the surface elastic wave and emitted out of the optical waveguide is applied to an optical member, such as a polarizing plate, a pinhole plate, or a light shield plate, which passes only a linear polarized component of the diffracted light beam.

摘要翻译： 将光束引入到LiNbO 3的基板上的光波导中，并由在光波导上由倾斜指状的啁啾叉指换能器产生的表面弹性波衍射。 光束被引导通过光波导的方向基本上与LiNbO 3衬底的z轴对准。 由表面弹性波衍射并从光波导发出的光束被施加到仅透射衍射光的线偏振分量的偏振板，针孔板或遮光板等光学构件 光束。

公开(公告)号：US5066126A

公开(公告)日：1991-11-19

申请号：US385746

申请日：1989-07-18

申请人： Masami Hatori

发明人： Masami Hatori

IPC分类号： G01J1/42 ,  G01J3/00 ,  G01J3/12 ,  G02F1/11 ,  G02F1/125

CPC分类号： G01J3/1256 ,  G01J3/0259 ,  G01J2001/4242 ,  G01N2201/0873

摘要： An optical spectrum analyzer includes a surface elastic wave generator for generating in an optical waveguide a surface elastic wave which has a continuously varying frequency and which diffracts and deflects a guided wave as it travels across the path of the guided wave, which guided wave is introduced as a measured light beam into and travels in the optical wave guide. The measured light beam which has been deflected is emitted from the optical waveguide and detected by a light detector. A modulator turns on and off or modulates the surface elastic wave by repeatedly energizing and de-energizing the surface elastic wave generator, the frequency of the modulation being lower than the continuously varying frequency. A filter receives a signal corresponding to the modulation frequency from the modulator and a signal corresponding to the measured light beam from the detector, and extracts a signal component having the same frequency as the modulation frequency from the signal received from the light detector. The frequency of the surface elastic wave is detected on the basis of the signal component extracted by the filler when the measured light beam is detected by the light detector.

摘要翻译： 光谱分析仪包括：表面弹性波发生器，用于在光波导中产生具有连续变化频率的表面弹性波，并且当导波在导波的路径上行进时衍射和偏转导波，该引导波被引入 作为测量光束进入并在光波导中行进。 已经偏转的测量光束从光波导发射并由光检测器检测。 调制器通过反复激励和断开表面弹性波发生器，使调制频率低于连续变化的频率来打开和关闭或调制表面弹性波。 滤波器从调制器接收对应于调制频率的信号和对应于来自检测器的测量光束的信号，并从从光检测器接收的信号中提取具有与调制频率相同频率的信号分量。 当由光检测器检测到测量光束时，基于由填料提取的信号分量来检测表面弹性波的频率。

公开(公告)号：US4961632A

公开(公告)日：1990-10-09

申请号：US288837

申请日：1988-12-23

申请人： Masami Hatori ,  Nobuharu Nozaki

发明人： Masami Hatori ,  Nobuharu Nozaki

IPC分类号： G02F1/335 ,  H04N1/12

CPC分类号： H04N1/1275 ,  G02F1/335 ,  H04N1/12

摘要： A waveguide-type light deflector or modulator includes an optical waveguide for guiding a light beam therethrough along a light path, and an interdigital transducer for generating surface elastic waves in the optical waveguide to diffract the light beam and for propagating the surface elastic waves in opposite directions across the light path, the interdigital transducer being transversely disposed to the light path in a substantially central position in the light path. In the light deflector, an alternating voltage with a continuously varying frequency is applied to the interdigital transducer to enable the surface elastic waves to continuously diffract and deflect the light beam. In the light modulator, the application of an alternating voltage to the interdigital transducer is controlled to vary the diffraction efficiency of the light beam, thereby to modulate the light beam.

摘要翻译： 波导型光偏转器或调制器包括用于沿着光路引导光束的光波导，以及用于在光波导中产生表面弹性波的叉指式换能器，以衍射光束并将表面弹性波传播到相反的方向 跨越光路的方向，叉指式换能器在光路中的基本中心位置横向地设置在光路上。 在光偏转器中，具有连续变化频率的交流电压被施加到叉指式换能器，以使表面弹性波能够连续地衍射和偏转光束。 在光调制器中，控制向叉指换能器施加交流电压以改变光束的衍射效率，从而调制光束。

公开(公告)号：US4940304A

公开(公告)日：1990-07-10

申请号：US384113

申请日：1989-07-24

申请人： Masami Hatori

发明人： Masami Hatori

IPC分类号： G02F1/335

CPC分类号： G02F1/335

摘要： An optical deflecting apparatus comprises optical deflectors each having a first generator for generating a first surface acoustic wave which advances to intersect an optical path of a guided optical wave advancing in an optical waveguide and deflects the guided optical wave, and a second generator for generating a second surface acoustic wave which advances to intersect the optical path of the guided and deflected optical wave and deflects the guided and deflected optical wave in a direction that amplifies the deflection. The first and second surface acoustic wave generators are formed to continuously change the frequencies of the first and second surface acoustic waves and the directions of advance thereof while satisfying specific conditions. The optical waveguides of the optical deflectors are disposed so that the optical waves radiated out of the optical waveguides scan in a line on a predetermined surface, and scanning extremities of the adjacent radiated optical waves adjoin each other.

摘要翻译： 光偏转装置包括光偏转器，每个光偏转器都具有第一发生器，用于产生第一表面声波，该第一表面声波前进到与在光波导中前进的导光光路的光路相交，并使引导光波偏转;以及第二发生器， 第二表面声波前进以与被引导和偏转的光波的光路相交，并使被引导和偏转的光波在放大偏转的方向上偏转。 第一和第二表面声波发生器被形成为在满足特定条件的同时连续地改变第一和第二声表面波的频率及其前进方向。 光偏转器的光波导被布置成使得从光波导辐射出的光波在预定表面上以一行的方式扫描，并且相邻辐射光波的四边扫描彼此相邻。

公开(公告)号：US4929042A

公开(公告)日：1990-05-29

申请号：US127020

申请日：1987-11-27

申请人： Masami Hatori ,  Nobuharu Nozaki ,  Kozi Kamiyama

发明人： Masami Hatori ,  Nobuharu Nozaki ,  Kozi Kamiyama

IPC分类号： G02F1/335

CPC分类号： G02F1/335

摘要： An optical deflecting apparatus comprises a first generator for generating a first surface acoustic wave which advances to intersect an optical path of a guided optical wave advancing inside of an optical waveguide and diffracts and deflects the guided optical wave, and a second generator for generating a second surface acoustic wave which advances to intersect the optical path of the guided and diffracted optical wave and diffracts and deflects the guided and diffracted optical wave in a direction that amplifies the deflection caused by the diffraction. The first and second surface acoustic wave generators are formed to continuously change the frequencies of the first and second surface acoustic waves and the directions of advance thereof while satisfying the conditions of k1+k1=k2 and k2+k2=k3 wherein k1 and k2 respectively denote wave vectors of the guided optical wave before and after being diffracted by the first surface acoustic wave, k3 denotes the wave vector of the guided optical wave after being diffracted by the second surface acoustic wave, and k1 and k2 respectively denote wave vectors of the first and second surface acoustic waves.