Optical amplifier transient control with gain error limits

Details Optical amplifier transient control with gain error limits Optical amplifier transient control with gain error limits

2007-08-29

2010-06-29

Bolda, Eric (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

Reexamination Certificate

active

07746548

ABSTRACT:
Optical amplifier transient control methods and apparatus which limit the extent of cumulative transient gain errors in the rapid control of multiple optical amplifiers in a communication system. In an exemplary embodiment, if the input power to an optical amplifier drops below a predetermined threshold, the gain of the amplifier is set to clamp the output power of the amplifier to its initial level less the threshold, thereby preventing the continuous growth of gain error. This is based on the assumption that once the input power goes below the threshold, it should no longer go above the threshold until the transient condition is corrected. The present invention can operate to handle down-as well as up-transient events and is not amplifier technology dependent.

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