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. 07, 2015
Filed:
Jan. 27, 2011
Atsuo Kozen, Yokohama, JP;
Yasuyoshi Ote, Yokohama, JP;
Jun-ichi Asaoka, Yokohama, JP;
Kenji Hirai, Yokohama, JP;
Hiroshi Yokoyama, Yokohama, JP;
Atsuo Kozen, Yokohama, JP;
Yasuyoshi Ote, Yokohama, JP;
Jun-ichi Asaoka, Yokohama, JP;
Kenji Hirai, Yokohama, JP;
Hiroshi Yokoyama, Yokohama, JP;
NTT Electronics Corporation, Kanagawa, JP;
Abstract
The ridge semiconductor laser is a semiconductor laser in which a carrier stopper layer made of an AlInAs compound, a clad layer made of an AlGaInAs compound, and an etching stopper layer made of an InGaAsP compound are stacked in sequence on one side of an active layer made of an AlGaInAs compound. The ridge semiconductor laser is provided with a ridge waveguide including, in a layer made of an InP compound, a diffraction grating made of an InGaAsP compound on the opposite side of the clad layer of the etching stopper layer.