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:
Apr. 14, 1992
Filed:
Dec. 14, 1989
Applicant:
Inventor:
Domenico Campi, Turin, IT;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ; G02F / ; G02F / ; H01L / ;
U.S. Cl.
CPC ...
359245 ; 359248 ; 359278 ; 359321 ; 357-4 ; 357 30 ;
Abstract
A coupled quantum well electro-optical modulator, whose semiconductor structure is composed of one or of a plurality of successions formed by two layers capable of forming quantum wells, of a barrier layer which separates the two layers and of an intrinsic layer which separates the succession from other possible successions, where in presence of an electric field the absorption threshold of the light radiation shifts towards shorter wavelengths.