Title :
Controlling a Semiconductor Optical Amplifier Using a State-Space Model
Author :
Kuntze, Scott B. ; Pavel, Lacra ; Aitchison, J.Stewart
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Toronto, Ont.
Abstract :
We derive nonlinear and linear state-space control models for a multichannel semiconductor optical amplifier. Verified against the governing partial differential equations through simulation, the linear model tracks modulations up to 20% qualitatively well. Linear feedback control is then employed to design two interchannel crosstalk suppressing systems, one using state feedback into the electronic drive current and the other using optical output feedback into an optical control channel; the controller designed with the linear model is seen to work well even with 100% modulations of the nonlinear system. This linear state-space model opens the way for further robust analysis, design and control of integrated active photonic circuits
Keywords :
laser feedback; optical crosstalk; optical modulation; partial differential equations; semiconductor optical amplifiers; state-space methods; electronic drive current; integrated active photonic circuits; interchannel crosstalk suppressing systems; linear feedback control; linear state-space control; nonlinear state-space control; nonlinear system; optical control channel; optical output feedback; partial differential equations; robust analysis; semiconductor optical amplifier; state feedback; state-space model; Feedback control; Nonlinear optics; Optical control; Optical crosstalk; Optical design; Optical feedback; Partial differential equations; Semiconductor optical amplifiers; State feedback; Stimulated emission; Feedback systems; gain control; linear approximation; optical crosstalk; optoelectronic control; power control; semiconductor optical amplifiers (SOAs); state space methods;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2006.887176
