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:
Nov. 29, 1988
Filed:
Dec. 16, 1986
Applicant:
Inventors:
Shigeyuki Akiba, Tokyo, JP;
Masashi Usami, Tokyo, JP;
Assignee:
Kokusai Denshin Denwa Kabushiki Kaisha, Tokyo, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ; H01S / ; H01L / ;
U.S. Cl.
CPC ...
372 50 ; 372 29 ; 372 96 ; 357 19 ;
Abstract
A distributed feedback semiconductor laser with monitor is disclosed, in which the energy gap of a cap layer formed on the laser region and the window region is smaller than the energy gap of the light emitting layer, and in which a pn junction isolated from a pn junction in the laser region is provided in the cap layer on the window region.