Abstract
We investigate the wavelength multicast performance of a 20 Gb/s (Gigabit
per second) orthogonally modulated ASK–differential phase-shift
keying (DPSK) signal. The multicast is achieved using four-wave mixing in a
32 cm highly nonlinear bismuth oxide fiber. Six multicast channels each
operating at 20 Gb/s are obtained at a 200-GHz spacing, resulting in a 120
Gb/s throughput. Widely opened eye diagrams are obtained in the detection of
both the ASK and DPSK components of the multicast channels. Bit error rate
measurements have also been performed for both the amplitude and the phase
of the signals. A power penalty of less than 3 dB is obtained in all the six
multicast channels.
© 2009 IEEE
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