Method for controlling the pump power of an optical amplifier
AssigneeSiemens Aktiengesellschaft
InventorLutz Rapp
Life of this patent
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Abstract
The present disclosure relates to a method for regulating a pump power of an optical amplifier, where a multiplexed broadband optical signal having several channels is amplified at a certain gain value while a change in power is detected at the input or output of the amplifier. A new pump power is calculated and adjusted based on a previously provided stable gain state of the optical amplifier after detecting the change in power such that deviations of the gain value remain minimal as planned temporary interface transients during a specific interval. The new pump power is thus calculated very accurately and quickly according to a model that takes into account the actual gain value, the wavelength dependence of active channels, aging effects, and non-linear amplification effects.
Claims7
A method for adapting a pump power of an optical amplifier, comprising:
- receiving an optical wavelength multiplex signal having a number of channels of different wavelengths;
- amplifying the optical wavelength multiplex signal;
- calculating a state of gain curve for the amplification of new input channel powers;
- detecting a change in input or output power, wherein when the change of input power occurs within a time interval that is smaller than a reaction time of the amplifier, the accumulated input and output power is measured, and, using the measured state of gain, a new pump power value is determined in a wavelength dependent manner so that a wavelength dependent gain curve of the amplifier becomes substantially constant.
Dependencies are inferred from the claim text.