Method and system for reducing Raman gain tilt error

Details Method and system for reducing Raman gain tilt error Method and system for reducing Raman gain tilt error

2006-05-02

2006-05-02

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

C359S334000

Reexamination Certificate

active

07038843

ABSTRACT:
A method and system in accordance with the present invention greatly reduces the gain error due to Raman gain tilt for individual channels in an optical communication system during a transient event by determining a shift in average power (and thus wavelength) and using the determined shift to alter the average gain in the optical communication system. In various embodiments of the present invention, the average gain of the optical communication system is altered by altering the average gain of an amplifier in the optical communication system. In alternate embodiments of the present invention having an in-line optical filter, the average gain of the optical communication system may be altered by altering the filtering of the optical channels in the optical communication system.

REFERENCES:
patent: 6275313 (2001-08-01), Denkin
patent: 6560008 (2003-05-01), Wada
patent: 6577438 (2003-06-01), Sugawara et al.
patent: 6785042 (2004-08-01), Onaka et al.
patent: 6859306 (2005-02-01), Fishman et al.
patent: 6891661 (2005-05-01), Hayashi et al.

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