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:
Nov. 21, 2017
Filed:
Dec. 09, 2014
Applicant:
Jds Uniphase Corporation, Milpitas, CA (US);
Inventor:
Fred L. Heismann, Colts Neck, NJ (US);
Assignee:
VIAVI SOLUTIONS INC., Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 10/079 (2013.01);
U.S. Cl.
CPC ...
H04B 10/07953 (2013.01); H04B 10/07951 (2013.01); H04B 10/07955 (2013.01);
Abstract
A method and apparatus for determining in-band OSNR in optical information signals, e.g. in polarization-multiplexed QPSK and higher-order M-ary QAM signals, are disclosed. A correlation measurement of the signal amplitude or power at two distinct optical frequencies of the signal may be used to determine the in-band optical noise in the signal. A measurement of the signal power may be used to determine the OSNR based on the determined in-band noise.