Abstract
An approach is proposed in this paper to generate ultra-wideband (UWB)
pulses based on cross-phase modulation (XPM) effects in nonlinear optical
loop mirror (NOLM). The NOLM can be considered as an optical switch which
is controlled by pump to generate positive and negative Gaussian pulses, which
are then delayed by SMF and combined to generate both Gaussian monocycle and
doublet pulses. These two pulse shapes can be switched at a high speed by
controlling the on–off of one of the probe. In addition, the SMF acting
as a chromatic dispersion media in generating the UWB pulses can also be used
to distribute the UWB signals from the central station (CS) to remote access
points (AP). Different distance between CS and remote APs has no effects on
the generated UWB pulses by adopting a wavelength tunable laser as probe.
© 2008 IEEE
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