Abstract
We propose an all-optical phase-interleaving technology based
on dual-pump four-wave mixing (FWM) in highly nonlinear fiber (HNLF). The
proposed all-optical phase-interleaving technology is applied in an all-optical
phase-multiplexing scheme to successfully phase-multiplex 2x or 3$\,\times\,$10-Gb/s DPSK-WDM signals
to a 20- or 30-Gb/s DPSK in non-return-to-zero (NRZ) formats. The proposed
all-optical phase multiplexing scheme is demonstrated using dual-pump FWM
in highly nonlinear silica and bismuth fibers. In contrast with optical time-division
multiplexing technology, the proposed all-optical phase-multiplexing technology
does not require pulse-carving, thus offering a high spectral-efficiency.
Differential precoder for each input tributary is operated independently,
and no additional encoder or postcoder is required to recover the original
data after demodulation on the receiver side.
© 2009 IEEE
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