Sumitomo Osaka Cement Co., Ltd.

Yuu Nakata

Norikazu Miyazaki

Satoshi Oikawa

Junichiro Ichikawa

Katsutoshi Kondou

Tetsuya Fujino

An optical modulation element that can be housed in the same housing together with an electronic circuit is implemented without deteriorating the high-frequency characteristics and the optical modulation characteristics and without increasing a size of the housing. An optical modulation element includes two Mach-Zehnder type optical waveguides that are provided on a substrate, a branched waveguide that branches input light which is input from an outside of the substrate into two light beams, two connection waveguides that respectively guide the light beams branched by the branched waveguide to the two Mach-Zehnder type optical waveguides, and electrodes that respectively control optical waves propagating in optical waveguides configuring the two Mach-Zehnder type optical waveguides, in which respective parallel waveguides of the two Mach-Zehnder type optical waveguides are configured to extend along one side of the substrate, the branched waveguide is disposed such that light is input from a direction of the one side, and the branched waveguide is formed to be line-symmetrical with respect to a propagation direction of the light input to the branched waveguide and to output the two branched light beams in a direction different from the propagation direction.

Optical modulation element and optical modulation module

An optical waveguide device includes a substrate with an electro-optic effect on which an optical waveguide and an electrode for controlling optical waves propagating through the optical waveguide are formed and at least one light source for irradiating ultraviolet light on the substrate.

Growing community of inventors

Tokyo, Japan

Yuu Nakata