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:
May. 15, 2018
Filed:
Sep. 13, 2017
Applicants:
Nec Corporation, Tokyo, JP;
Photonics Electronics Technology Research Association, Tokyo, JP;
Inventors:
Masatoshi Tokushima, Tokyo, JP;
Jun Ushida, Tokyo, JP;
Assignees:
NEC CORPORATION, Tokyo, JP;
PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/34 (2006.01); G02B 27/09 (2006.01); G02B 1/11 (2015.01);
U.S. Cl.
CPC ...
G02B 6/34 (2013.01); G02B 1/11 (2013.01); G02B 27/095 (2013.01);
Abstract
A grating coupler includes a grating including a core and an anti-phase reflection coating provided on at least one part of the grating. The anti-phase reflection coating includes a high refractive index layer and a buffer layer. The high refractive index layer has at least one selected from a plurality of attributes characterizing the high refractive index layer. The at least one selected attribute gradually deceases along a propagation direction of light in the core of the grating.