Abstract
We propose and experimentally demonstrate the use of an incoherent spectrally
sliced amplified spontaneous emission (ASE) source as the pump for broadband
stimulated Brillouin scattering-based slow light. Both 2.5-Gb/s on-off-keyed
and differential-phase-shift-keyed signals are continuously delayed by as
much as 170 ps, with less than 4-dB power penalty at $10^{-9}$ bit error rate. A 2-GHz and
a 4-GHz spectrally sliced pump are compared, emphasizing the need of optimizing
the slow-light spectral-width according to the signal bandwidth. Furthermore,
independent and simultaneous delay on multiple data channels with different
modulation formats within a single slow-light medium is proposed and experimentally
demonstrated by using a periodically spectrally sliced ASE source. Our approach
might be useful in future heterogeneous multiformat, multibit-rate, and multichannel
fiber-optic communication systems and networks.
© 2008 IEEE
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