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:
Jun. 23, 2020
Filed:
Jan. 13, 2020
Applicant:
Elenion Technologies, Llc, New York, NY (US);
Inventor:
Thomas Wetteland Baehr-Jones, Arcadia, CA (US);
Assignee:
Elenion Technologies, LLC, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/64 (2013.01); H04B 10/61 (2013.01); H04J 14/06 (2006.01);
U.S. Cl.
CPC ...
H04B 10/64 (2013.01); H04B 10/6165 (2013.01); H04B 10/6166 (2013.01); H04J 14/06 (2013.01);
Abstract
An optical IQ demodulator that does not require a power-consuming DSP is disclosed. A DC offset is added to one of the I and Q optical signal components at an IQ transmitter. After mixing with an LO signal and differential detection at the receiver, this DC offset results in a heterodyne-frequency tone in each of the quadrature detection channels of the receiver. The phase of this oscillation is recovered using a PLL circuit, which output is used to separate the transmitter I and Q channels for decoding thereof using conventional electronics.