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:
Oct. 05, 2021
Filed:
Feb. 12, 2020
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;
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/12 (2006.01); G02B 6/125 (2006.01); G02B 6/28 (2006.01); G02B 6/293 (2006.01); G02B 6/30 (2006.01); G02B 6/34 (2006.01); G02B 6/42 (2006.01);
U.S. Cl.
CPC ...
G02B 6/29344 (2013.01); G02B 6/29338 (2013.01); G02B 6/29311 (2013.01);
Abstract
To provide an optical element that can be more easily aligned with an optical fiber, an optical element includes one grating coupler optically coupled to an optical fiber, a waveguide connected to the grating coupler, a multimode interferometer connected to the waveguide on the opposite side to the grating coupler, and a waveguide inserted between two input/output ports on the branched side of the multimode interferometer.