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:
Sep. 01, 2015
Filed:
Jul. 02, 2013
Sumitomo Electric Industries, Ltd., Osaka-shi, Osaka, JP;
Yutaka Onishi, Yamato, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A semiconductor optical device includes a light receiving device; an optical waveguide having a mesa structure, the optical waveguide including first, second, third, and fourth waveguide portions; and a passivation layer provided on a side surface of the light receiving device. The mesa structure in the second waveguide portion has a width increasing along the waveguide axis, and the mesa structure in the third waveguide portion has a width decreasing along the waveguide axis. The second waveguide portion includes first and second regions, the first region being optically coupled to the first waveguide portion and the second region being optically coupled to the third waveguide portion. The passivation layer is provided on side surfaces of the mesa structure in the second region, the third waveguide portion, and the fourth waveguide portion. The mesa structures in the first waveguide portion and the first region have side surfaces without the passivation layer.