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. 22, 2022
Filed:
Mar. 19, 2021
Applicant:
Google Llc, Mountain View, CA (US);
Inventors:
Xiang Zhou, Sunnyvale, CA (US);
Hong Liu, Palo Alto, CA (US);
Assignee:
Google LLC, Mountain View, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/61 (2013.01); H04B 10/54 (2013.01); H04B 10/556 (2013.01); H04B 10/2507 (2013.01); H04B 10/524 (2013.01); H04J 14/06 (2006.01);
U.S. Cl.
CPC ...
H04B 10/5561 (2013.01); H04B 10/25073 (2013.01); H04B 10/524 (2013.01); H04B 10/541 (2013.01); H04J 14/06 (2013.01);
Abstract
A receiver system is provided for receiving a coherent Pulse Amplitude Modulation (PAM) encoded signal. The receiver system may include an optical polarization component configured to modulate a polarization of the received coherent PAM encoded signal. The receiver system may further include a digital signal processor (DSP) configured to perform polarization recovery between the received coherent PAM encoded signal and the LO signal using a first control loop, and to perform phase recovery between the received coherent PAM encoded signal and the LO signal using a second control loop.