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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