Abstract
In this paper, we present an analysis of semiconductor optical amplifier
(SOA)-based differential Mach–Zehnder wavelength converters with a specific
focus on optimizing performance through intentional asymmetries in optical
power splitting, SOA bias, and interferometer phase bias. By introducing a
simple conceptual framework for understanding the amplifier pulse dynamics,
two simple yet effective design rules are derived. These design rules are
validated using pseudorandom code in a comprehensive computer model, demonstrating
the performance penalties that result when attempting optimization using only
unequal SOA biasing or phase biasing. This work illustrates that dramatic
improvements in extinction and eye margin can be achieved with optimized splitter
asymmetries, and have significant implications for improved network performance
and converter cascadability.
© 2009 IEEE
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