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. 30, 2011
Filed:
Dec. 30, 2010
Takuya Fujii, Yamanashi, JP;
Takuya Fujii, Yamanashi, JP;
Eudyna Devices Inc., Yamanashi, JP;
Abstract
An optical semiconductor device includes a waveguide having one or more first segments having a region that includes a diffractive grating and another region combined to the region, one or more second segments having a region that includes a diffractive grating and another region combined to the region and a plurality of third segments having a region the includes a diffractive grating and another region combined to the region, a length of the second segment being different from that of the first segment, a length of the third segment being shown as L=L+(L−L)×Kin which 0.3≦K≦0.7, Lis a length of the first segment, Lis a length of the second segment and Lis a length of the third segment; and a refractive index control portion controlling refractive index of the first segment through the third segments.