Abstract
In this paper, we derive a new analytical state–space
model for semiconductor optical amplifier (SOA) dynamics with nonlinear gain
compression. We show that a multichannel closed-form state–space model
is possible with polynomial gain compression and position-independent carrier
density. The compressed model is significantly more accurate than existing
noncompressed models as demonstrated by comparison with pump–probe experiments:
response magnitude and recovery time are more accurately modeled with explicit
gain compression. We then apply the model to design an optical feedback controller
that regulates the total optical power at the output of a gain-compressed
SOA.
© 2008 IEEE
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