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:
Jan. 05, 2016
Filed:
May. 12, 2014
Applicant:
Google Inc., Mountain View, CA (US);
Inventors:
Xiang Zhou, Los Altos, CA (US);
Erji Mao, San Jose, CA (US);
Assignee:
Google Inc., Mountain View, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/54 (2013.01); H04B 10/50 (2013.01); H04B 10/524 (2013.01);
U.S. Cl.
CPC ...
H04B 10/504 (2013.01);
Abstract
In some implementations, the output of a directly modulated laser (DML) includes nonlinearities with respect to the input signal driving the DML. When the DML is transmitting an amplitude modulated signal, the nonlinearities can induce noise into the signal, which makes it difficult for a receiving node to correctly decode the received signal. The system and methods described herein pre-correct the error caused by the nonlinearities of the DML by filtering (or pre-correcting) the data signal that drives the DML.