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:
Aug. 17, 2010
Filed:
Oct. 15, 2008
Tsutomu Yamaguchi, Tokyo, JP;
Takehiro Nishida, Tokyo, JP;
Yuji Okura, Tokyo, JP;
Tadashi Takase, Tokyo, JP;
Tsutomu Yamaguchi, Tokyo, JP;
Takehiro Nishida, Tokyo, JP;
Yuji Okura, Tokyo, JP;
Tadashi Takase, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A semiconductor laser having a double channel ridge structure includes: a ridge; channel portions located on opposite sides of the ridge, sandwiching the ridge, and having an equivalent refractive index lower than the equivalent refractive index of the ridge; and layers defining outside surfaces of the channel portions and, having an equivalent refractive index higher than the equivalent refractive index of the channel portions. The ridge has a flare ridge structure with a width that is widened toward a light outgoing end surface, and the width of the channel portions where the width of the ridge is the narrowest is wider than the channel portions at the light outgoing end surface.