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. 01, 2011
Filed:
Apr. 07, 2006
Applicants:
Chandra Bontu, Nepean, CA;
Han Sun, Nepean, CA;
Kim B Roberts, Nepean, CA;
Kuang Tsan Wu, Kanata, CA;
Inventors:
Chandra Bontu, Nepean, CA;
Han Sun, Nepean, CA;
Kim B Roberts, Nepean, CA;
Kuang Tsan Wu, Kanata, CA;
Assignee:
Ciena Corporation, Linthicum, MD (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 10/06 (2006.01); H04B 10/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods and systems for compensating a frequency mismatch Δf between a local Oscillator (LO) of a coherent optical receiver and a carrier of a received optical signal. An average frequency of the LO is controlled to compensate at least long-period variations of the frequency mismatch. An electrical carrier recovery circuit for compensating short period variations of the frequency mismatch.