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:
Nov. 19, 2013
Filed:
Aug. 07, 2006
Applicant:
Takuya Fujii, Yamanashi, JP;
Inventor:
Takuya Fujii, Yamanashi, JP;
Assignee:
Eudyna Devices Inc., Yamanashi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 3/10 (2006.01); H01S 3/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor laser has a first diffractive grating area. The first diffractive grating area has a plurality of segments. Each segment has a first area including a diffractive grating and a second area that is space area combined to the first area. Optical lengths of at least two of the second areas are different from each other. A refractive-index of each of the segments are changeable.