Application of robust L2 control to erbium doped fiber amplifier: Input and state uncertainty

We extend the results of our previous work (2005) to increase the robustness of an L₂ nonlinear controller applied to an erbium doped fiber amplifier (EDFA). We consider the rejection of input and state uncertainties to a full information (FI) extended state space model of the EDFA. The generic robust stabilization problem is solved and the concept of state uncertainty is shown to be associated to parametric uncertainty in the EDFA model. We compare the improved robust L₂ controller to the standard L₂ controller in our previous work (2005)