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. 26, 2006
Filed:
Oct. 22, 2003
Akinori Hayakawa, Kawasaki, JP;
Yoshihiro Sato, Kawasaki, JP;
Ken Morito, Kawasaki, JP;
Norihiko Sekine, Machida, JP;
Akinori Hayakawa, Kawasaki, JP;
Yoshihiro Sato, Kawasaki, JP;
Ken Morito, Kawasaki, JP;
Norihiko Sekine, Machida, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A light oscillation part including an active layer for generating light by current injection, a tuning layer with an intermediate layer formed between the active layer and the tuning layer, for varying an oscillation wavelength by current injection and a diffraction grating formed near the active layer and the tuning layer, and a light amplification part including an active layer for amplifying light by current injection are formed on a semiconductor substrate. Light oscillation elements having wide wavelength variation ranges and the light amplification are integrated on a semiconductor substrate, whereby wide wavelength variation ranges can be obtained and the output light can be much increased.