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:
Feb. 21, 1989
Filed:
Sep. 09, 1986
Applicant:
Inventors:
Takahiro Suyama, Tenri, JP;
Kohsei Takahashi, Tenri, JP;
Saburo Yamamoto, Nara, JP;
Toshiro Hayakawa, Nara, JP;
Masafumi Kondo, Tenri, JP;
Assignee:
501 Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 19 ; 372 32 ; 372 49 ;
Abstract
A semiconductor laser device comprising a multi-layered semiconductor crystal containing an active region for laser oscillation, wherein the extended portions of said active region which are adjacent to both sides of one facet having the width of a selected value of said device constitute light-absorbing regions by which light in a high-order transverse mode is absorbed to a greater extent than that in a fundamental transverse mode, thereby achieving laser oscillation in a stable fundamental transverse mode up to a high output power.