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. 15, 1994
Filed:
Nov. 09, 1992
Applicant:
Inventor:
Bernard Groussin, Les Ulis, FR;
Assignee:
Thomson Hybrides, Puteaux, FR;
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 36 ; 257745 ; 372 50 ;
Abstract
The disclosure relates to integrated circuits of lasers, wherein the linear arrays are supplied in series, with a return of current through the substrate. When the substrate is semi-insulating, only the first epitaxially grown layer is conductive. To reduce its electrical resistance, a surface film of the substrate is made conductive by diffusion of a dopant. Application to power semiconductor lasers.