Abstract
We discuss the design and realization of a passive all-optical device
for 2R regeneration based on a dual-stage of high-speed microcavity saturable
absorbers, one for noise reduction of digital zeros (SA-0), and the other
for noise reduction of digital ones (SA-1). The numerical and experimental
results showed that by using a simple combination of SA-0 and SA-1 devices,
one can obtain an intensity transfer function with a large extinction ratio
improvement of low power levels and a strongly nonlinear response reducing
the noise of high power levels. The amplitude and phase characterization of
a 40-GHz signal transmitted by this device, obtained by frequency-resolved
optical gating measurements, reveals the intensity-dependant pulse-compression
effect and the low chirp introduced by this device.
© 2011 IEEE
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