Abstract
In this paper, we propose and demonstrate the practical all-optical wavelength
multicasting scheme based on the four-wave mixing (FWM) effect in both a highly
nonlinear fiber (HNLF) and a semiconductor optical amplifier (SOA). Then we carry out
comprehensive comparisons of the performance differences between using the HNLF and SOA
for this proposed multicasting scheme. Seven multicast channels are experimentally
demonstrated by using three copolarized probes and a modulated signal. The merit of the
proposed scheme is that the polarization sensitivity is significantly reduced from more
than 20 dB to approximately 5 dB using the HNFL and 2.5 dB using the SOA. The low
polarization sensitivity leads to a difference of less than 1 dB in the power penalty of
the multicast channels at bit error rate (BER) = 10-9. In addition, we
compare the multicasting performance of the OOK and differential phase-shift keying
(DPSK) signals using the proposed scheme and found that the power penalties of the DPSK
multicast channels in the HNLF and the SOA are less than 1.25 and 1.1 dB respectively,
and the power penalties of the OOK multicast channels are less than 1.5 dB and 3.1 dB in
the HNLF and the SOA, respectively.
© 2010 IEEE
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