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. 03, 2018
Filed:
Jun. 26, 2014
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Toshimitsu Kaneko, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Abstract
An optical semiconductor device is provided as one achieving reduction of power in phase control. The optical semiconductor device has: a first optical waveguide having a plurality of segments each of which has a diffraction grating region with a diffraction grating and a space portion coupled to the diffraction grating region, having two ends interposed between the diffraction grating regions, and having a constant optical length, wherein at least one of the segments is provided with a phase shift structure; a first phase control device for adjusting a phase of light in each segment with the phase shift structure; and a second phase control device for adjusting a phase of light in each segment without the phase shift structure.