Seikoh Giken Co., Ltd.

National Institute of Advanced Industrial Science and Technology

Mie University

Masahiro Sato

Hiroshi Murata

Satoru Kurokawa

Yoshikazu Toba

An optical waveguide, an optical waveguideare formed on a substrateto be crossed with each other, modulator electrodesandare arranged along the optical waveguides, and antennas(i.e., square patch antennas having an approximately same shape) are arranged around four corners of the square shape. The modulator electrodeis energized from the antennaand the antenna, the modulator electrodeis energized from the antennaand the antenna, the modulator electrodeis energized from the antennaand the antenna, and the modulator electrodeis energized from the antennaand the antenna. The light wave propagating through the optical waveguideis modulated by an electric field of Y-direction, and the light wave propagating through the optical waveguideis modulated by an electric field of X-direction.

Electric field detection device and electric field detector

An electro-optic modulator includes a substrate made of a material which has an electro-optic effect and a pyroelectric effect. In the substrate, an optical waveguide is formed to have at least a pair of optical paths. On the substrate and on the optical waveguide, a transparent buffer layer is formed to cover the optical waveguide. On the buffer layer, first and second electrodes are formed so that the first and the second electrodes are arranged to cause refractive index changes in the pair of optical paths in response to electrical fields surrounding the electro-optic modulator. The buffer layer is a mutual diffusion layer. The mutual diffusion layer is made from laminated films having at least one transparent insulator film and at least one transparent conductor film but has no clear boundary between the transparent insulator film and the transparent conductor film.

Electro-optic modulator

An electro-optic modulator () comprises a substrate () made of a material which has an electro-optic effect and a pyroelectric effect. In the substrate (), an optical waveguide () is formed to have at least a pair of optical paths. On the substrate () and on the optical waveguide (), a transparent buffer layer () is formed to cover the optical waveguide (). On the buffer layer (), first and second electrodes () are formed so that the first and the second electrodes () are arranged to cause refractive index changes in the pair of optical paths in response to electrical fields surrounding the electro-optic modulator (). The buffer layer () is a mutual diffusion layer. The mutual diffusion layer is made from laminated films comprised of at least one transparent insulator film and at least one transparent conductor film but has no clear boundary between the transparent insulator film and the transparent conductor film.

Growing community of inventors

Sendai, Japan

Masahiro Sato