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:
Oct. 14, 2008
Filed:
Jul. 23, 2004
Applicants:
Atsushi Sugitatsu, Tokyo, JP;
Susumu Noda, Kyoto, JP;
Inventors:
Atsushi Sugitatsu, Tokyo, JP;
Susumu Noda, Kyoto, JP;
Assignees:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Kyoto University, Kyoto, Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 3/08 (2006.01); H01L 33/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an optical device, a slab layer includes an active layer sandwiched between cladding layers. The slab layer has a periodic refractive index profile structure in a two-dimensional plane, as a two-dimensional slab photonic crystal structure, and a linear defect region serving as a waveguide in the periodic refractive index profile structure. Regions having different widths of the waveguides, as segments of the waveguide, are connected in series.