Using gain tilt for local compensation of unwanted power...

Details Using gain tilt for local compensation of unwanted power... Using gain tilt for local compensation of unwanted power...

2007-05-29

2007-05-29

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

C359S337400, C359S337100

Reexamination Certificate

active

10185110

ABSTRACT:
A compensator for optical transmission systems exploits gain tilt inherent in optical amplifiers. The amount of SRS induced spectral power gradient is determined, and the amplifier gain is changed to cause a compensating gain gradient in the optical amplifier to compensate for the SRS induced spectral power gradient. Fewer components are needed, and so it can be less expensive. It can be implemented as a simple software upgrade to existing systems. Many such compensators can be distributed through the system, without requiring a large inventory of individually specified filters. More accurate compensation can be achieved by making it dependent on the distribution of wavelengths within a band.

REFERENCES:
patent: 5818629 (1998-10-01), Kinoshita
patent: 6275313 (2001-08-01), Denkin et al.
patent: 6359726 (2002-03-01), Onaka et al.
patent: 6785042 (2004-08-01), Onaka et al.
patent: 7034993 (2006-04-01), Kajiya et al.
patent: 10040472 (2002-03-01), None
patent: 2001-007768 (2001-01-01), None

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