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. 19, 1994
Filed:
Mar. 26, 1993
Applicant:
Inventors:
Elliott R Brown, Billerica, MA (US);
K Alexander McIntosh, Groton, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
2503381 ; 2503385 ; 25033901 ;
Abstract
A GaAs/AlGaAs multiple-quantum-well (MQW) is used as an optical mixer for environmental monitoring of atmospheric emission or absorption signals in the infrared (IR) region. The atmospheric signals are combined with coherent laser local oscillator emission lines to produce IF signals within the electrical bandwidth of the MQW mixer.