公开(公告)号：US4491384A

公开(公告)日：1985-01-01

申请号：US339309

申请日：1982-01-15

申请人： Tsukasa Yamashita ,  Masaharu Matano ,  Kazuhiko Mori ,  Norihiro Ota

发明人： Tsukasa Yamashita ,  Masaharu Matano ,  Kazuhiko Mori ,  Norihiro Ota

IPC分类号： G02F1/335 ,  G02B5/14

CPC分类号： G02F1/335

摘要： By an electro-optical switch or an optical switch element utilizing diffraction by a surface acoustic wave, an input light beam is first switched over to one of light beams two or a multiple of two in number and propagating in different directions. By a surface acoustic wave which is discretely variable in frequency, the light beam in each of the different propagation direction is deflected at angles in accordance with the varying frequencies while propagating through an optical waveguide layer. It is possible to obtain by switching a very large total number of output light beams which are equal in number to the number of resolvable deflected light beams obtained in the frequency bandwidth of one surface acoustic wave, multiplied by the number of light beams obtained by switching with the optical switch element.

摘要翻译： 通过利用表面声波衍射的电光开关或光开关元件，首先将输入光束切换成两个或两个数量的光束中的一个，并在不同方向上传播。 通过频率离散变化的表面声波，在通过光波导层传播的同时，根据变化的频率以不同传播方向的每一个的光束偏转。 可以通过切换数量相等于在一个声表面波的频率带宽中获得的可分辨偏转光束的数量乘以通过切换获得的光束的数量的输出光束的总数而获得 与光开关元件。

公开(公告)号：US4595253A

公开(公告)日：1986-06-17

申请号：US716605

申请日：1985-03-27

申请人： Tsukasa Yamashita ,  Masaharu Matano ,  Kazuhiko Mori ,  Norihiro Ota

发明人： Tsukasa Yamashita ,  Masaharu Matano ,  Kazuhiko Mori ,  Norihiro Ota

IPC分类号： G02F1/335 ,  G02B6/10

CPC分类号： G02F1/335

摘要： A plurality of incident light beams are parallelly propagated in a thin film optical waveguide. Simultaneously, a surface acoustic wave is propagated in said thin film optical waveguide, and the plurality of incident light beams are selectively successively guided to a light output part by the acousto-optic effect of said by Bragg diffraction. The diffraction light beams are serially output. In this way optical data parallelly input are directly converted into optical data in a serial state.

摘要翻译： 多个入射光束在薄膜光波导中平行传播。 同时，在所述薄膜光波导中传播表面声波，并且通过所述布拉格衍射的声光效应将多个入射光束选择性地连续地引导到光输出部分。 衍射光束被串联输出。 以这种方式，并行输入的光学数据被直接转换为串行状态的光学数据。

公开(公告)号：US4532632A

公开(公告)日：1985-07-30

申请号：US403819

申请日：1982-07-30

申请人： Tsukasa Yamashita ,  Kazuhiko Mori ,  Masaharu Matano ,  Norihiro Ota

发明人： Tsukasa Yamashita ,  Kazuhiko Mori ,  Masaharu Matano ,  Norihiro Ota

IPC分类号： H01L41/08 ,  H01S3/02 ,  H01S3/06 ,  H01S3/105 ,  H01S3/106 ,  H01S5/00 ,  H01S5/02 ,  H01S5/042 ,  H01S5/06 ,  H01S5/0625 ,  H01S5/125 ,  H01S5/40 ,  H04B10/27 ,  H04B10/272 ,  H04Q3/52 ,  H01S3/19

CPC分类号： H01S3/1055 ,  H01S5/125 ,  H01S5/4031 ,  H01S5/0425 ,  H01S5/0607 ,  H01S5/06256 ,  H01S5/1234

摘要： A tunable semiconductor laser has an active layer, an insulating film made of a piezoelectric material and formed on a portion of the active layer, and an interdigital transducer provided on the insulating film for generating a surface acoustic wave. The laser oscillation wavelength is variable by varying the wavelength of the surface acoustic wave generated by the transducer. When adapted to produce surface acoustic waves of different frequencies at different locations, the transducer affords an enlarged tunable wavelength band. A plurality of Gunn diodes effecting oscillation at different frequencies are usable in place of the transducer.

摘要翻译： 可调谐半导体激光器具有有源层，由压电材料制成并形成在有源层的一部分上的绝缘膜，以及设置在绝缘膜上用于产生表面声波的叉指换能器。 通过改变由换能器产生的表面声波的波长，激光振荡波长是可变的。 当适应于在不同位置产生不同频率的表面声波时，换能器提供可扩展的可调波长带。 可以使用在不同频率下实现振荡的多个耿氏二极管代替换能器。