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. 22, 2014
Filed:
Apr. 05, 2010
Applicant:
Manabu Matsuda, Kawasaki, JP;
Inventor:
Manabu Matsuda, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 5/026 (2006.01); H01S 5/125 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor laser includes an active region including an active layer, and a diffraction grating and a phase shift which determine an oscillation wavelength, and a distributed reflector region including a light guide layer and a refection diffraction grating. The distributed reflector region has an effective diffraction grating period which varies along a direction of a cavity.