Optical communications – Receiver – Heterodyne
Reexamination Certificate
2006-12-22
2011-12-06
Curs, Nathan (Department: 2613)
Optical communications
Receiver
Heterodyne
C398S202000, C398S204000, C398S208000
Reexamination Certificate
active
08073345
ABSTRACT:
A method for determining symbols PSK modulated on an optical carrier includes interfering a first polarization component of the modulated optical carrier and a reference optical carrier in a first optical mixer and interfering the first polarization component of the modulated optical carrier and the reference with a different relative phase in a second optical mixer. The method also includes sampling the interfered carriers from the first optical mixer to produce first digital sampled values and sampling the interfered carriers from the second optical mixer to produce second digital sampled values. The first and second digital sampled values of a sampling period form a first complex sampling value thereof. The method also includes offsetting a phase of a complex signal value corresponding to each first complex sampling value to correct for a phase error caused by a frequency offset between the modulated and reference optical carriers.
REFERENCES:
patent: 4732447 (1988-03-01), Wright et al.
patent: 5077531 (1991-12-01), Takeuchi et al.
patent: 5920228 (1999-07-01), Soga et al.
patent: 6038267 (2000-03-01), Oura et al.
patent: 6314145 (2001-11-01), van Driest
patent: 7327913 (2008-02-01), Shpantzer et al.
patent: 2006/0245766 (2006-11-01), Taylor
patent: 2007/0036555 (2007-02-01), Chen et al.
patent: 2007/0092259 (2007-04-01), Bontu et al.
patent: 2007/0297806 (2007-12-01), Kaneda et al.
patent: 2008/0008268 (2008-01-01), Koc
“Blind Equalization Using the Constant Modulus Criterion: A Review” by C. Richard Johnson, Jr. et al, published inProceedings of the IEEE, vol. 86, No. 10, Oct. 1998, pp. 1927-1950.
“Digital Equalisation of 40 Gbit/s per Wavelength Transmission over 2480km of Standard Fibre without Optical Dispersion Compensation” by S.J. Savory et al, published inProceedings of the 32nd European Conference of optical communications(ECOC), vol. 4, pp. 105-106, Sep. 28, 2006.
Digital Communication Receivers—Synchronization, Channel Estimation, and Signal Processing, by H. Meyr, M. Moeneclaey, and S. A. Fechtel (Wiley, 1998) pp. 4356-4463.
U.S. Appl. No. 11/204,607, filed Aug. 15, 2005, Chen et al.
U.S. Appl. No. 11/644,555, filed Dec. 22, 2006, Koc.
Reinhold Noe, “Phase Noise-Tolerant Synchronous QPSK/BPSK Baseband-Type Intradyne Receiver Concept With Feedforward Carrier Recovery”, Journal of Lightwave Technology, vol. 23., No. 2, Feb. 2005, pp. 802-808.
Yan Han and Guifang Li, “Coherent Optical Communication Using Polarization Multiple-Input-Multiple-Output”, Optics Express, Sep. 19, 2005 / vol. 13, No. 19, pp. 7527-7534.
Andreas Leven, et al, “Frequency Estimation in Intradyne Reception,”IEEE Photonics Technology Letters, vol. 19, No. 6, Mar. 15, 2007, pp. 366-368.
U.S. Appl. No. 11/426,191, filed Jun. 23, 2006, N. Kaneda, et al.
U.S. Appl. No. 11/483,280, filed Jul. 7, 2006, U-V. Koc.
F. Derr, “Optical QPSK Transmission System With Novel Digital Receiver Concept,”Electronics Letters, vol. 27, No. 23, pp. 2177-2179, Nov. 7, 1991.
U-V. Koc, et al, “Digital Coherent Quadrature Phase-Shift-Keying (QPSK),” inProc. Optical Fiber Conference and the 2006 National Fiber Optic Engineers Conference(OFC), Anaheim, CA, Mar. 5-10, 2006, 3 pages.
D-S, Ly-Gagnon, et al, “Coherent Detection of Optical Quadrature Phase-Shift Keying Signals With Carrier Phase Estimation,”Journal of Lightwave Technology, vol. 24, No. 1, Jan. 2006, pp. 12-21.
T. Pfau, et al, “First Real-Time Data Recovery for Synchronous QPSK Transmission With Standard DFB Lasers,”IEEE Photonics Technology Letters, vol. 18, No. 18, Sep. 15, 2006, pp. 1907-1909.
M.G. Taylor, “Accurate Digital Phase Estimation Process for Coherent Detection Using a Parallel Digital Processor,”in Proc. European Conference, Optical Communication, ECOC 2005 Proceedings—vol. 2, Glasgow, UK., pp. 263-264.
H. Meyr, et al,Digital Communication Receivers, Synchronization, Channel Estimation, And Signal Processing, John Wiley & Sons, Inc., New York, 1998 ch. 8.2.2., pp. 457-463.
Soldano, Lucas B. et al, “Optical Multi-Mode Interference Devices Based on Self-Imaging: Principles and Applications”, J. of Lightwave Technology, vol. 13, No. 4, Apr. 1995, pp. 615-627.
“Optical Hybrid”, Wikipedia, the free encyclopedia, (http://en.wikipedia.org/wiki/Optical—hybrid), Dec. 30, 2006, 4 pages.
Chen Young-Kai
Kaneda Noriaki
Koc Ut-Va
Leven Andreas Bertold
Alcatel Lucent
Curs Nathan
McCabe John F.
Ngo Tanya
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