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:
May. 21, 1991
Filed:
Apr. 26, 1990
Applicant:
Inventor:
Peter D Greene, Harlow, GB;
Assignee:
STC plc, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
357-4 ; 357 16 ; 357 30 ; 350355 ;
Abstract
A quantum confined Stark effect (QCSE) optical modulator element has one or more quantum wells each bounded by assymetric barriers. This provides a device in which the direction and magnitude of the electric field induced absorption edge shift corresponds to the polarity and intensity of an applied electric field.