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. 29, 1989
Filed:
Apr. 27, 1988
Applicant:
Inventors:
Takahiro Suyama, Tenri, JP;
Kosei Takahashi, Nara, JP;
Masafumi Kondo, Tenri, JP;
Toshiro Hayakawa, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 45 ; 372 46 ;
Abstract
A semiconductor laser device comprising an active layer, optical guiding layers sandwiching the active layer therebetween, and a cladding layer disposed on each of the optical guiding layers, wherein the refractive index of each of the optical guiding layers gradually varies in the direction of the thickness of the optical guiding layer, and the thickness of each of the cladding layers is 0.5 um or less.