公开(公告)号：US20240159970A1

公开(公告)日：2024-05-16

申请号：US18284498

申请日：2022-03-30

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Takeshi SAKAI ,  Toshio KATAOKA ,  Yu KATAOKA

IPC: G02B6/34 ,  G02B6/30

CPC classification number: G02B6/34 ,  G02B6/30

Abstract: An optical waveguide device that enables a location in which an optical loss such as a propagation loss or a coupling loss occurs to be easily specified is provided. An optical waveguide device includes a substrate 1 on which an optical waveguide 2 is formed, and a grating 6 formed in a part of the optical waveguide 2 or a grating 6 connected to a monitoring optical waveguide 5 that merges with or branches from a part of the optical waveguide 2, in which inputting a light wave into the optical waveguide or outputting at least a part of the light wave propagating through the optical waveguide is performed through the grating 6.

公开(公告)号：US20210302766A1

公开(公告)日：2021-09-30

申请号：US17170034

申请日：2021-02-08

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Takeshi SAKAI ,  Toshio KATAOKA

IPC: G02F1/035 ,  G02F1/21

Abstract: An optical modulator includes a substrate on which an optical waveguide and a modulation electrode that modulates a light wave propagating through the optical waveguide are formed, and a case housing the substrate, the optical waveguide includes at least an optical branching part that branches one light wave into two light waves or an optical combining part that combines two light waves into one light wave, the modulation electrode has a signal electrode and a ground electrode, and a part of the signal electrode is disposed so as to cross the optical branching part or the optical combining part, and the optical modulator is provided with a suppressing unit that suppresses changes in an intensity ratio of the light waves branched at the optical branching part or an intensity ratio of the light waves combined at the optical combining part, by the signal electrode.

公开(公告)号：US20180095301A1

公开(公告)日：2018-04-05

申请号：US15719582

申请日：2017-09-29

Applicant: SUMITOMO OSAKA CEMENT CO., LTD.

Inventor： Takeshi SAKAI ,  Junichiro ICHIKAWA

IPC: G02F1/01

CPC classification number: G02F1/0102 ,  G02F1/011 ,  G02F1/0123 ,  G02F1/035 ,  G02F1/225

Abstract: Provided is an optical modulator module including a waveguide substrate in which an optical waveguide and control electrodes (signal electrode, DC bias electrodes, and the like) for controlling a light wave propagating through the optical waveguide are formed, a relay substrate which is disposed in the vicinity of the waveguide substrate and in which a DC bias wiring for supplying a DC bias voltage to the control electrodes (DC bias electrodes) is formed, and a package case which stores the waveguide substrate and the relay substrate. A loop of wire standing from the relay substrate to a position higher than a top surface of the waveguide substrate is provided in a part of the DC bias wiring. The loop of wire is disposed inside the package case at a position within 10 mm from any one of locations where a solder is used.