公开(公告)号：US20210026167A1

公开(公告)日：2021-01-28

申请号：US17042816

申请日：2019-02-27

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yuki KUGIMOTO ,  Yoichi HOSOKAWA

IPC: G02F1/035

Abstract: Provided is an optical modulator that includes an adhesive layer whose thickness can be reduced and that ensures high reliability, while band-widening and low voltage drive are realized.
An optical modulator includes features as follows: a substrate (optical waveguide substrate) having an electro-optic effect; an optical waveguide formed on the substrate; and a traveling-wave electrode (signal electrode and ground electrode) formed on the substrate in order to modulate a light wave propagating through the optical waveguide, in which the substrate has a thickness of 30 μm or lower, a reinforcing substrate that holds the substrate through an adhesive layer interposed between the reinforcing substrate and the substrate is provided, and the adhesive layer includes an air gap section where no adhesive agent is present.

公开(公告)号：US20180284352A1

公开(公告)日：2018-10-04

申请号：US15941024

申请日：2018-03-30

Applicant: Sumitomo Osaka Cement Co., Ltd

Inventor： Norikazu MIYAZAKI ,  Yoichi HOSOKAWA ,  Yuu KATAOKA

IPC: G02B6/32 ,  G02B6/27

CPC classification number: G02B6/32 ,  G02B6/2773 ,  G02B6/30 ,  G02F1/225 ,  G02F2001/212

Abstract: Provided is an optical element module including: a substrate; an optical modulator unit that is formed in the substrate and includes an optical waveguide; a first lens unit that is disposed on an end surface of the substrate, and includes a lens portion at which a signal light beam emitted from the optical modulator unit is collimated; and a second lens unit that introduces the signal light beam passing through the first lens unit to an optical fiber. The optical modulator unit includes a Mach-Zehnder type optical waveguide, a Y-branch coupler of the Mach-Zehnder type optical waveguide includes an output waveguide through which a signal light beam is guided, and a radiated light beam waveguide through which a radiated light beam is guided, and an unnecessary light beam removing unit, which suppresses input of a higher-order mode light beam propagating through the output waveguide or a leaked light beam propagating through the inside of the substrate into the optical fiber through the lens portions of the first lens unit, is provided between the output waveguide and the radiated light beam waveguide in the vicinity of an end of the substrate.

公开(公告)号：US20190302493A1

公开(公告)日：2019-10-03

申请号：US16360033

申请日：2019-03-21

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Yoichi HOSOKAWA ,  Masayuki MOTOYA

IPC: G02F1/035 ,  G02F1/225 ,  G02B6/12 ,  G02F1/03

Abstract: An optical waveguide element that has improved frequency response in a high frequency region is provided. An optical waveguide element includes: a substrate that has an electro-optic effect; an optical waveguide that is formed on the substrate; a control electrode that is for modulating light waves propagating through the optical waveguide; and a reinforcing substrate that holds the substrate via an adhesion layer, and the reinforcing substrate has a low-dielectric constant portion with a lower dielectric constant than that of the reinforcing substrate at least in a part of a region in a plan view of the reinforcing substrate such that the low-dielectric constant portion partitions the reinforcing substrate in a thickness direction.

公开(公告)号：US20180284351A1

公开(公告)日：2018-10-04

申请号：US15938145

申请日：2018-03-28

Applicant: Sumitomo Osaka Cement Co., Ltd

Inventor： Yuu KATAOKA ,  Yoichi HOSOKAWA ,  Norikazu MIYAZAKI

IPC: G02B6/28 ,  G02B6/122

CPC classification number: G02B6/2804 ,  G02B6/1228

Abstract: An optical waveguide device includes a substrate in which an optical waveguide is formed. The optical waveguide has a Y-branched structure in which light beams propagating through a main waveguide are branched into two parts, and a three-branched structure in which the optical waveguide is branched into three waveguides including the main waveguide and two sub-waveguides on both sides of the main waveguide at a front stage of the Y-branched structure. The main waveguide includes a linear waveguide portion in which a waveguide width is constant and a tapered waveguide portion in which the waveguide width gradually increases between the three-branched structure and the Y-branched structure.

公开(公告)号：US20180059445A1

公开(公告)日：2018-03-01

申请号：US15689718

申请日：2017-08-29

Applicant: Sumitomo Osaka Cement Co., Ltd

Inventor： Norikazu MIYAZAKI ,  Yoichi HOSOKAWA

IPC: G02F1/035 ,  G02F1/225 ,  G02B6/12 ,  G02B6/42 ,  G02F1/03

CPC classification number: G02F1/035 ,  G02B6/12 ,  G02B6/42 ,  G02F1/0327 ,  G02F1/2252 ,  G02F2001/212 ,  G02F2201/122

Abstract: Modulation electrodes, bias electrodes, and bias electrodes are disposed in this order in a light wave-travelling direction in an optical modulation region modulating light having a wavelength. On the other hand, in an optical modulation region modulating light having a wavelength, the bias electrodes, the bias electrodes, and the modulation electrodes are disposed in this order in the light wave-travelling direction. That is, an order of the modulation electrodes and the bias electrodes in a longitudinal direction of a substrate is changed for each of the wavelengths.