A method and system for multi-level power management in an optical network
is provided. They include three levels of power equalization. The first
level of power management equalizes the powers of channels in a band of
channels. The second level of power management equalizes the average
powers of bands of channels on a fiber. The third level of control
equalizes the powers of bands of channels on working and protection
fibers for a path in the optical network. As a result, this multi-level
power management in the network provides a dynamic, automatic method for
the network to adjust to changing operating conditions and configurations
and to maintain relatively stable network powers. Each level of power
management may be implemented jointly or independently, and operates
autonomously so that, for example, one modification comprises continuous
first level control and only periodic second level control.