Optical: systems and elements – Optical amplifier – Correction of deleterious effects
Reexamination Certificate
2007-07-31
2007-07-31
Hughes, Deandra M. (Department: 3663)
Optical: systems and elements
Optical amplifier
Correction of deleterious effects
C398S025000, C398S037000
Reexamination Certificate
active
10903588
ABSTRACT:
In an optical transmission system, operations of certain elements are adjusted in an individualized manner after detecting a change in the total optical power level corresponding to multiple optical channels in a link of the system in order to control transients in those channels. For example, in response to a sudden drop in the number of channels resulting from a fiber cut, the power levels of the optical pumps in a Raman amplifier in an OADM are adjusted to reduce transient gain errors in the surviving channels, where the adjustment to the pump power level for each different optical pump is a function of both the detected change in the total optical power level and at least one specified coefficient for that particular optical pump, in order to handle non-linearities in the response of the Raman amplifier to the sudden drop in the number of optical channels.
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Kilper Daniel C.
Martell Claude A.
Raghavan Narasimhan
Sadler David A.
White Christopher A.
Hughes Deandra M.
Lucent Technologies - Inc.
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