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:
Mar. 30, 2021
Filed:
Feb. 28, 2020
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Mitsubishi Electric Corporation, Tokyo, JP;
Keisuke Kojima, Weston, MA (US);
Mitsunobu Gotoda, Amagasaki, JP;
Toshiaki Koike-Akino, Belmont, MA (US);
Muhammad Tahersima, Washington, DC (US);
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A grating coupler having first and second ends for coupling a light beam to a waveguide of a chip includes a substrate configured to receive the light beam from the first end and transmit the light beam through the second end, the substrate having a first refractive index n, a grating structure having curved grating lines arranged on the substrate, the grating structure having a second refractive index n, wherein the curved grating lines have line width w and height d and are arranged by a pitch Λ, wherein the second refractive index nis less than first refractive index n, and a cladding layer configured to cover the grating structure, wherein the cladding layer has a third refractive index n