The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 2021
Filed:
Sep. 30, 2019
The Japan Steel Works, Ltd., Tokyo, JP;
Toshifumi Yonai, Tokyo, JP;
Kazuhito Kishida, Tokyo, JP;
Rinzo Kayano, Tokyo, JP;
Satoru Ohsaki, Tokyo, JP;
Kengo Ogawa, Tokyo, JP;
Kouhei Kurimoto, Tokyo, JP;
Hiroaki Yokota, Tokyo, JP;
Shoji Kakio, Yamanashi, JP;
THE JAPAN STEEL WORKS, LTD., Tokyo, JP;
Abstract
An optical modulator, a substrate for an optical modulator, a method of manufacturing an optical modulator, and a method of manufacturing a substrate for an optical modulator that can reduce a propagation loss are provided. An optical modulatoraccording to an embodiment includes: a base substrate; a waveguide substratedisposed over the base substrateand including an electro-optic effect; a waveguideformed on the waveguide substratefor performing optical modulation; and an electrodeconfigured to apply a voltage to the waveguide. Here, the base substrateand the waveguide substrateare made of the same material, the waveguideis formed inside the waveguide substrate, and a refractive index of the waveguide substrateis larger than a refractive index of the base substrate