Optical communications – Transmitter and receiver system – Including compensation
Reexamination Certificate
2005-10-25
2005-10-25
Sedighian, M. R. (Department: 2633)
Optical communications
Transmitter and receiver system
Including compensation
C398S202000, C398S208000, C398S209000, C398S027000
Reexamination Certificate
active
06959154
ABSTRACT:
Link robustness, chromatic dispersion and polarization mode dispersion (PMD) immunity can be improved in fiber optical system by using a method for receiving an optical double sideband signal over an optical fiber system, comprising the steps of splitting the received optical double sideband signal into an upper sideband signal and a lower sideband signal, photodetecting the upper sideband and the lower sideband, equalizing the photodetected upper sideband signal and the lower sideband signal, and combining the equalized upper sideband signal with the equalized lower sideband signal. While PMD compensation is envisioned as a major application, one may also use the method and system for chromatic dispersion compesation or dispersion slope compensation in high bit rate systems, i.e. using dispersion compensation fiber (DCF) for coarse compensation and diversity receiver with electrical equalizer for fine tuning.
REFERENCES:
patent: 3665443 (1972-05-01), Galvin
patent: 5162937 (1992-11-01), Heidemann et al.
patent: 5245347 (1993-09-01), Bonta et al.
patent: 5298962 (1994-03-01), Nourrcier
patent: 5377035 (1994-12-01), Wang et al.
patent: 5522004 (1996-05-01), Djupsjobacka et al.
patent: 5739866 (1998-04-01), Kim et al.
patent: 5793511 (1998-08-01), Buelow et al.
patent: 6040932 (2000-03-01), Duck et al.
patent: 6072616 (2000-06-01), Cohen et al.
patent: 6115162 (2000-09-01), Graves et al.
patent: 6337756 (2002-01-01), Djupsjobacka
patent: 6359716 (2002-03-01), Taylor
patent: 6559988 (2003-05-01), Nielsen et al.
patent: 2001/0050926 (2001-12-01), Kumar
patent: 4415176 (1994-11-01), None
patent: 0409260 (1991-01-01), None
patent: 409260 (1991-01-01), None
patent: HEI 4-206766 (1994-02-01), None
patent: HEI 10-259009 (2000-03-01), None
Japanese Patent No. 405153052—machine translation from http://www.ipdl.jpo.go.jp/homepg—e.ipdl.
“Tunable RF-power-fading compensation of multiple-channel double-sideband SCM transmission using a nonlinearly chirped FBG”; Sun et al.; Photonics Technology Letters, IEEE, vol. 12, Issue 5, May 2000, pp. 546-548.
H. Bülow, et al., “Adaptive PMD Mitigation at 10 Gbit/s using an Electronic SiGe Equaliser IC,” ECOC '99, Sep. 26-30, 1999, pp. 138-139.
L.M. Lunardi, et al., “Performance Monitoring for Transparent Optical Networks,” AT&T Labs—Research.
M. Fregolent, et al., “Adaptive Optical Receiver for Performance Monitoring and Electronic Mitigation of Transmission Impairments,” ECOC 2000 Paper 2.1.2., Sep. 4, 2000.
S.L. Woodward, et al., “PMD Mitigation via Single-Sideband Modulation and Principal-State Launch,” AT&T Labs—Research.
Communication and European Search Report, dated Oct. 5, 2002, from European Patent Application No. 01127367.9, four pages.
Gnauck Alan H.
Lam Cedric F.
Woodward Sheryl L.
AT&T Corp.
Curs Nathan
Sedighian M. R.
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