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:
Jan. 02, 2018
Filed:
Mar. 06, 2017
Applicant:
Fujikura Ltd., Tokyo, JP;
Inventors:
Hiroyuki Kusaka, Tokyo, JP;
Ryokichi Matsumoto, Sakura, JP;
Kazuhiro Goi, Sakura, JP;
Kensuke Ogawa, Sakura, JP;
Assignee:
FUJIKURA LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/035 (2006.01); G02B 6/126 (2006.01); G02B 6/125 (2006.01); G02B 6/122 (2006.01); G02B 6/12 (2006.01); G02F 1/225 (2006.01); G02B 6/27 (2006.01); G02F 1/21 (2006.01);
U.S. Cl.
CPC ...
G02B 6/126 (2013.01); G02B 6/12004 (2013.01); G02B 6/125 (2013.01); G02B 6/1228 (2013.01); G02B 6/278 (2013.01); G02F 1/225 (2013.01); G02B 2006/12123 (2013.01); G02F 2001/212 (2013.01);
Abstract
An optical waveguide element includes a core and a cladding that is made of SiO. When nis a group refractive index of a TEpolarized wave in the i-th waveguide counted from a light incidence plane of the core and nis a group refractive index of a TMpolarized wave in the i-th waveguide, the length L[m] of the i-th waveguide satisfies a predetermined relation.