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. 12, 2016
Filed:
Nov. 25, 2014
Applicant:
James D. Crockett, Pasadena, CA (US);
Inventors:
Eduard Y. Luzhanskiy, Ellicott City, MD (US);
James D. Crockett, Pasadena, CA (US);
Assignee:
Northrop Grumman Systems Corporation, Falls Church, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/67 (2013.01); H04B 10/69 (2013.01); H04B 10/112 (2013.01);
U.S. Cl.
CPC ...
H04B 10/673 (2013.01); H04B 10/112 (2013.01); H04B 10/6931 (2013.01);
Abstract
A system includes a first low noise amplifier (LNA) having a first gain to amplify an optical input signal and to generate an amplified optical output signal. The first gain is set to compensate for signal losses in the optical input signal due to atmospheric fading. A second LNA having a second gain amplifies the amplified optical output signal from the first LNA and generates a saturated output signal when the combined first and second gain of the first LNA and the second LNA exceeds a predetermined output saturation level of a photo detector.