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:
Aug. 27, 2019
Filed:
Feb. 17, 2017
Applicant:
Ngk Insulators, Ltd., Nagoya, JP;
Inventors:
Keiichiro Asai, Nagoya, JP;
Shoichiro Yamaguchi, Ichinomiya, JP;
Jungo Kondo, Miyoshi, JP;
Toshihiro Tomita, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/18 (2006.01); G02B 6/12 (2006.01); G02B 6/124 (2006.01); H01S 5/12 (2006.01); H01S 5/14 (2006.01); H01S 5/026 (2006.01); H01S 5/028 (2006.01);
U.S. Cl.
CPC ...
G02B 5/1866 (2013.01); H01S 5/026 (2013.01); H01S 5/1231 (2013.01); H01S 5/141 (2013.01); G02B 6/124 (2013.01); G02B 2006/121 (2013.01); G02B 2006/12107 (2013.01); G02B 2006/12161 (2013.01); H01S 5/0287 (2013.01); H01S 5/1237 (2013.01);
Abstract
A grating device includes an optical material layer; a channel type optical waveguide region provided in the optical material layer; extension regions provided on the outsides of the channel type optical waveguide region, respectively; a Bragg grating provided in the channel type optical waveguide region; and periodic microstructures provided in the extension regions, respectively. The periodic microstructures are provided in 50 percent or larger of a total of areas of the extension regions.