Optical: systems and elements – Optical amplifier – Optical fiber
Reexamination Certificate
2005-05-17
2005-05-17
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Optical fiber
C359S341430
Reexamination Certificate
active
06894832
ABSTRACT:
A technique for adaptively controlling a gain of an optical amplifier is disclosed. In one particular exemplary embodiment, the technique may be realized by a method comprising the steps of measuring an output power signal of the optical amplifier; computing a command signal from an input power signal; computing a model state signal of a reference model; computing a model output signal of the reference model based at least in part on the model state signal; computing an error signal between the model output signal and the output power signal of the optical amplifier; adjusting at least one adaptive control gain value to minimize the error signal; and computing a control input signal for driving the optical amplifier based at least in part on the at least one adaptive control gain value, the error signal, the model state signal and the command signal.
REFERENCES:
patent: 6246514 (2001-06-01), Bonnedal et al.
patent: 6366393 (2002-04-01), Feulner et al.
patent: 6678088 (2004-01-01), Stummer et al.
patent: 6757099 (2004-06-01), Pavel et al.
patent: 6762878 (2004-07-01), Park et al.
patent: WO 9806191 (1998-02-01), None
M. Zirngibl, “Gain control in erbium-doped fiber amplifiers by an all-optical feedback loop,” Electron. Lett., vol. 27, No. 7, 1991, pp. 560-561.
E. Delevaque et al., “Gain control in erbium-doped fibre amplifiers by lasing at 1480nm with photoinduced bragg gratings written in fibre ends,” Electron. Lett., vol. 29, 1993, pp. 1112-1113.
B. Landousies, T. Georges, E. Delevaque, R. Lebref, and M Monerie, “Low power transients in multichannel equalised and stabilised gain amplifier using passive gain control,” Electron. Lett., vol. 32, 1996, pp. 1912-1913.
J.L. Zyskind, A. K. Srivastava, Y. Sun, J.C. Ellison, G. W. Newsome, R. W. Tkach, A.R. Chraplyvy, J.W. Sulhoff, T.A. Strasser, J.R. Pedrazzani, and C. Wolf, “Fast link control protection for surviving channels in multiwavelength optical networks,” 22ndEuropean Conf. on Optical Commun. ECOC'96, Oslo, Norway, 1996, ThC.3.6, pp. 5.49-5.52.
F. Shehadeh, R.S. Vodhanel, C. Gibbons, and M. Ali, “Comparison of gain control techiques to stabilize EDFA's for WDM networks,” OFC '96 Technical Digest, pp. 190-191.
J. L. Jackel and D. Richards, “All-optical stabilization of cascaded multichannel erbium-doped fiber amplifiers with changing numbers of channels,” OFC '97 Technical Digest, pp. 84-85.
A. K. Srivastava, et al., “EDFA Transient Response to Channel Loss in WDM Transmission System,” IEEE Photonics Technology Letters, vol. 9, No. 3, Mar. 1997, pp. 386-388.
Y. Sun et al., “Fast power transients in WDM optical networks with cascaded EDFAs,” Electronics Letters, 13thFeb. 1997, vol. 33, No. 4, pp. 313-314.
Aweya James
Felske Kent
Montuno Delfin Y.
Ouellette Michel
Hellner Mark
Hunton & Williams LLP
Nortel Networks Limited
LandOfFree
Technique for adaptively controlling gain in an 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 Technique for adaptively controlling gain in an optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Technique for adaptively controlling gain in an optical... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3444289