Abstract
Chirp characteristics of Silicon
Mach–Zehnder Interferometer (MZI) modulators
with forward-biased p-i-n and reverse-biased p-n
structures are investigated by performing small-signal
simulation, respectively. Simulation result shows that
the chirp parameter is negative and influenced by the
carrier absorption effect, the amplitude, and the
frequency of applied sinusoidal modulating signals.
Chirp performance at 10 GHz modulation frequency can be
obtained by utilizing p-n depletion mode structure.
Finally, a way to further lower the absolute value of
the chirp parameter is provided by operating the MZI in
a push–pull configuration.
© 2011 IEEE
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