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. 30, 2019
Filed:
Jan. 29, 2018
Sumitomo Electric Industries, Ltd., Osaka, JP;
Tsukuru Katsuyama, Yokohama, JP;
Takashi Kato, Chigasaki, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A semiconductor laser includes a mesa structure disposed on a principal surface of a substrate, the mesa structure extending in a direction of an axis parallel to the principal surface, the mesa structure including an active region that includes a quantum well, the active region having top and bottom surfaces, and first, second, third and fourth side surfaces; an emitter region disposed on at least one of the first and second side surfaces, and the top and bottom surfaces; and a collector region including a quantum filter structure disposed on at least one of the side surfaces. The collector region is separated from the emitter region on the mesa structure. The first and second side surfaces extend in the direction of the axis. The third side surface extends in a direction intersecting the axis.