Optical communications – Receiver – Including postcompensation
Reexamination Certificate
2007-12-19
2011-12-13
Curs, Nathan (Department: 2613)
Optical communications
Receiver
Including postcompensation
C398S152000, C398S202000, C398S205000, C398S209000, C398S210000, C398S211000
Reexamination Certificate
active
08078065
ABSTRACT:
According to one embodiment, an optical receiver adapted to recover OOK or PAM data carried by a modulated optical carrier has an optical detector adapted to produce a sequence of vector pairs having first and second digital vectors indicative of complex values of first and second polarization components, respectively, of the modulated optical carrier at a corresponding sampling time. The optical receiver also has a digital processor that is connected to receive the sequence and is adapted to perform a rotation on each pair in a manner that tends to compensate for polarization rotation produced by transmitting the modulated optical carrier from an optical transmitter thereof to the optical receiver. The digital processor is further adapted to estimate values of the OOK or PAM data encoded onto each of the first and second polarization components based on the vectors produced by the rotation in a manner responsive to values of energy errors in the estimated values.
REFERENCES:
patent: 6714742 (2004-03-01), Hayee et al.
patent: 2002/0008506 (2002-01-01), Nakada et al.
patent: 2002/0042802 (2002-04-01), Mogi et al.
patent: 2002/0186435 (2002-12-01), Shpantzer et al.
patent: 2004/0146099 (2004-07-01), Denny et al.
patent: 2004/0264598 (2004-12-01), Demir et al.
patent: 2005/0196176 (2005-09-01), Sun et al.
patent: 2007/0092259 (2007-04-01), Bontu et al.
patent: 2008/0152362 (2008-06-01), Koc
patent: 2009/0034981 (2009-02-01), Kato
Quadrature amplitude modulation (QAM). (2001). In Hargraves's Communications Dictionary, Wiley. Retrieved from http://www.credoreference.com/entry/hargravecomms/quadrature—amplitude—modulation—qam.
“System and Method for Receiving Coherent, Polarization-Multiplexed Optical Signals,” by Noriaki Kaneda, et al., U.S. Appl. No. 11/426,191, filed Jun. 23, 2006.
J.H. Winters, “Equalization in Coherent Lightwave Systems Using Microwave Waveguides,” J. Lightwave Technology, vol. 7, No. 5, May 1989, pp. 813-815.
Alcatel Lucent
Curs Nathan
Gruzdkov Yuri
Mendelsohn Steve
Mendelsohn, Drucker & Associates P.C.
LandOfFree
Polarization tracking and signal equalization for optical... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polarization tracking and signal equalization for optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarization tracking and signal equalization for optical... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4271804