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:
Mar. 23, 2004
Filed:
May. 17, 2002
John D. Bruno, Bowie, MD (US);
Mary S. Tobin, Silver Spring, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A quantum-confined Stark effect semiconductor optical modulator, operable to modulate light of a particular wavelength in the range of around 780 to 840 nm. A p-i-n diode having p, intrinsic and n regions, as well as first and second electrical contacts for application of a reverse bias voltage defines the modulator. The particular intrinsic region includes a plurality of semiconductor layers defining a plurality of quantum wells separated by barrier layers having a certain bandgap energy above that of the quantum wells. The quantum wells including at least two ultra-thin barrier layers within the quantum well and being of a material having a certain bandgap energy above that of the quantum wells. The width of each ultra-thin barrier layer is no more than approximately two molecular layers thick.