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:
Dec. 01, 2015
Filed:
Sep. 07, 2010
Peter J. Winzer, Aberdeen, NJ (US);
Xiang Liu, Marlboro, NJ (US);
Chandrasekhar Sethumadhavan, Matawan, NJ (US);
Alan H. Gnauck, Middletown, NJ (US);
Peter J. Winzer, Aberdeen, NJ (US);
Xiang Liu, Marlboro, NJ (US);
Chandrasekhar Sethumadhavan, Matawan, NJ (US);
Alan H. Gnauck, Middletown, NJ (US);
Alcatel Lucent, Boulogne-Billancourt, FR;
Abstract
In one embodiment, a coherent optical receiver has a digital signal processor that processes one or more digital I/Q-signal pairs to recover data carried by a modulated optical signal in a manner that mitigates, based on calibration data retrieved from a memory or on appropriate performance measures and feedback mechanisms, the detrimental effects of frequency-dependent imbalances between the I and Q sub-channels of at least one of the I/Q channels of the receiver. In various embodiments, the calibration data can be generated and written into the memory at the fabrication facility or in situ while the receiver is being operated in a calibration mode. Alternatively or in addition, the calibration data can be generated and dynamically adjusted online during normal operation of the receiver.