Abstract
We propose and analyze a photonic-assisted periodic triangular-shaped pulses
generator, in which a continuous wave (CW) laser is connected to a dual electrode
Mach-Zehnder modulator (De-MZM), and then the De-MZM is connected with a normal
dispersion fiber or element. A radio frequency (RF) sinusoid directly drives the De-MZM
to obtain optical subcarrier modulation with optical carrier suppression. By carefully
setting the physical parameters, the generated harmonics of optical intensity can be
corresponding to the Fourier components of typical periodic triangular pulses. Numerical
simulations reveal that modulation index must be set to 2.305 and bias voltage drift
must be within a range from -2.5%-1.5% from the minimum transmission
of the De-MZM. In addition, the dispersion must be set correctly to suppress the primary
distortion of 4th order harmonics.
© 2012 IEEE
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