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:
Dec. 16, 2008
Filed:
Jun. 29, 2005
Kiichi Hamamoto, Tokyo, JP;
Jan DE Merlier, Tokyo, JP;
Kiichi Hamamoto, Tokyo, JP;
Jan De Merlier, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
To provide a semiconductor laser diode and a semiconductor optical amplifier and an optical communication device incorporating the semiconductor laser diode or the semiconductor optical amplifier which enable low power consumption and high optical output. A semiconductor laser diode according to an embodiment of the present invention is a semiconductor laser diodecomprised of an active waveguide, the active waveguide including a first waveguidethat supplies a plurality of modes including a fundamental mode; and a second waveguidethat is wider than the first waveguideand supplies a multimode, wherein the fundamental mode is provided as an oscillation light oscillated from the active waveguide.