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:
Mar. 06, 2007
Filed:
Mar. 15, 2004
Yutaka Mihashi, Tokyo, JP;
Tohru Takiguchi, Tokyo, JP;
Toshio Tanaka, Tokyo, JP;
Tomoko Kadowaki, Tokyo, JP;
Yoshihiko Hanamaki, Tokyo, JP;
Nobuyuki Tomita, Tokyo, JP;
Yutaka Mihashi, Tokyo, JP;
Tohru Takiguchi, Tokyo, JP;
Toshio Tanaka, Tokyo, JP;
Tomoko Kadowaki, Tokyo, JP;
Yoshihiko Hanamaki, Tokyo, JP;
Nobuyuki Tomita, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A ridge waveguide semiconductor laser includes an active layer, semiconductor layers on the active layer and having a ridge-shaped waveguide, an insulating film on the semiconductor layer, a first electrode layer in contact with the semiconductor layer through an opening in the insulating film, and a second electrode layer on the first electrode layer having a stripe shape and extending along the waveguide. A distance from an end face of a resonator of the laser to an edge of the second electrode layer does not exceed 20 μm.