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:
Apr. 04, 2017
Filed:
Mar. 20, 2015
Applicants:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Nec Corporation, Minato-ku, Tokyo, JP;
Inventors:
Assignees:
FUJITSU LIMITED, Kawasaki, JP;
NEC CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/42 (2006.01); G02B 6/124 (2006.01);
U.S. Cl.
CPC ...
G02B 6/4266 (2013.01); G02B 6/124 (2013.01); G02B 6/4207 (2013.01);
Abstract
Light that returns through reflection from the optical connection portion between a semiconductor optical waveguide and an optically functional element is reduced through the use of a simplified structure in a semiconductor optical waveguide device. The device is provided with an anti-reflection diffraction grating having the period to prevent light that has been led through the semiconductor optical waveguide towards the portion connected to the optically functional element from being reflected in the direction from which the light has been led.