Sumitomo Osaka Cement Co., Ltd.

Takatomo Itou

Junichiro Ichikawa

Shingo Takano

Yoshizumi Ishikawa

Minoru Shinozaki

Yukihiro Yazawa

An optical modulator according to the present invention comprises: a substrate which has electro-optic effects; an optical waveguide which is provided in the substrate; an optical fiber which is bonded to an end of the optical waveguide; a fixation member which is provided on an end part of the optical fiber; and an optical adhesive layer which bonds the optical fiber and the substrate to each other. The end of the optical waveguide is arranged in an end face of the substrate; the optical adhesive layer optically couples an end face of the optical fiber and an end of the optical waveguide with each other, while bonding the optical fiber, the fixation member and the substrate with each other; and the surface roughness of a surface of the fixation member, wherein the surface faces the end face of the substrate, is different from the surface roughness of an end face of the substrate, wherein the end face faces the surface of the fixation member.

Optical modulator

Provided is an optical modulator module in which an occurrence of an error burst or an increase of an optical loss caused by a vapor phase transportation material can be effectively suppressed. The optical modulator module includes a substratethat has a pyroelectric effect, an optical waveguidethat is formed on a principal surface of the substrate, a conductive film (not illustrated) that is formed on the substrate, and control electrodes (to) that control a light wave propagated through the optical waveguide. In the optical modulator module, the light wave is input to an end portionof the optical waveguide (or is output from the end portionof the optical waveguide) by a space optical system (not illustrated). Adsorption meansfor adsorbing a vapor phase transportation material is disposed in the vicinity of the end portionof the optical waveguide.

Optical modulator module

An optical modulator according to the present invention includes an optical branching section having at least one beam splitter and a mirror and configured to branch input light, a lens configured to converge the respective lights branched in the optical branching section, a plurality of phase modulation sections each configured to perform phase modulation of each light which is input thereto through the lens, and an optical combining section configured to combine a plurality of phase-modulated lights which are output from the plurality of phase modulation sections, and output modulated signal light.

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Tokyo, Japan

Takatomo Itou