Abstract

We demonstrate a method to use phase-modulated pumps for multicasting of return-to-zero differential phase-shift keying (RZ-DPSK) signals. The method uses phase modulation of the input signal along with the co-phase- modulated pumps prior to wavelength conversion. Nine copies of a 50Gbit/s RZ-DPSK data signal are generated via four-wave mixing with an average conversion efficiency of 0dB. An average receiver sensitivity penalty of 1.9dB is observed at a bit-error rate of 109 with a worst case of 2.3dB. The effects of synchronization errors and phase-modulation frequencies up to 5GHz are investigated.

© 2011 Optical Society of America

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