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:
Dec. 28, 1993
Filed:
May. 21, 1992
Mitra Dutta, Matawan, NJ (US);
Hongen Shen, Howell, NJ (US);
Jagadeesh Pamulapati, Colts Neck, NJ (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
An optic modulator which employs strained multiple quantum well structures which are fabricated and spaced from one another such that the stress perpendicular to the direction of the spacing is released leaving only a uniaxial stress along the direction parallel to the spacing. The multiple quantum well structures are then sandwiched between two optic polarizers which are aligned perpendicular to one another. At zero electric field, polarized light passing from the first polarizer is further polarized such that the polarization of the light is rotated to pass through the second polarizer. When an electric field is applied across the heterostructure, light passing through the heterostructure is not further polarized and therefore, the optic signal is interrupted. Thus, optic signals may be modulated with the contrast of polarizing modulators at the speed of superlattice heterostructures.