公开(公告)号：US20040213499A1

公开(公告)日：2004-10-28

申请号：US10826343

申请日：2004-04-19

Applicant: YOKOGAWA ELECTRIC CORPORATION

Inventor： Shun-ichi Miyazaki ,  Akira Miura ,  Shinji Kobayashi ,  Morio Wada ,  Tsuyoshi Yakihara ,  Sadaharu Oka ,  Shinji Iio ,  Tadashige Fujita ,  Chie Sato

IPC: G02F001/295

CPC classification number: G02F1/313 ,  G02F1/292 ,  G02F2201/307

Abstract: An active diffraction grating that has a high degree of freedom in control, small size and high reliability is realized. The active diffraction grating comprises an optical waveguide formed on a two-dimensional plane and electrodes formed on both sides of the optical waveguide, wherein one of the electrodes is formed as plural spot electrodes at a constant spacing in a matrix form on the two-dimensional plane, and with respect to the size of the spot electrodes and the distance between the spot electrodes, the spot electrodes are small and dense enough to function as a line when the spot electrodes are arrayed in a straight line within the diameter of light incident on the optical waveguide, and wherein plural spot electrodes of the spot electrodes arranged in the matrix form are selected and a voltage is applied thereto so as to form at least two parallel lines having a predetermined angle to the traveling direction of the light incident on the optical waveguide, and when the light incident on the two-dimensional plane waveguide is reflected by said at least two parallel lines, the refractive index of the optical waveguide is partly changed so that the wavelength of the light, the angle of the two lines to the incident light and the distance between the lines satisfy a Bragg reflection condition.

Abstract translation: 实现了具有高自由度控制，小尺寸和高可靠性的主动衍射光栅。 主动衍射光栅包括形成在二维平面上的光波导和形成在光波导两侧的电极，其中一个电极以矩阵形式以恒定的间隔形成为二维的 平面，并且相对于点电极的尺寸和点电极之间的距离，点电极小而致密，足以在点电极以直线排列在入射到光的直径内的直线上发挥作用 光波导，并且其中以矩阵形式布置的点电极的多个点电极被选择并且向其施加电压，以便形成至少两条与入射在光学器件上的光的行进方向具有预定角度的平行线 并且当入射到二维平面波导上的光被所述至少两条平行线反射时，折射率为t 光波导部分地变化，使得光的波长，两条线对入射光的角度和线之间的距离满足布拉格反射条件。