Abstract
Future Internet infrastructure will require the utilization
of new all-optical devices able to enhance the use of fiber capacity. Nevertheless,
before deploying such devices, it is necessary to test them under conditions
similar to the ones of commercial networks and to evaluate their impact on
real-world applications. In this work we investigate the performance of a
tunable fiber four-wave mixing all-optical wavelength converter (AOWC) on
a video-streaming carried through a field-trial network. This analysis is
performed by measuring the packet-error rate (PER) degradation caused by the
AOWC for different wavelength separations between the input and output optical
carriers. To the best of our knowledge, this is the first time that such a
cross-layer effect is systematically evaluated for an AOWC. A dynamic polarization
controller was successfully used to prevent the FWM efficiency variations
that were caused by the changes in the state-of-polarization of the video
signal. Our results show that the AOWC introduced a maximum power penalty
of 2.5 dB for wavelength separations of up to 12 nm. We also find that such
a penalty is related to the optical signal-to-noise ratio degradation induced
by the converter.
© 2009 IEEE
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