Multipump Four-Wave Mixing in a Photonic Crystal Fiber for 6$\times$10 Gb/s Wavelength Multicasting of DPSK Signals

We demonstrate differential phase-shift keying wavelength multicasting using four-wave mixing in a 64-m dispersion-flattened highly nonlinear photonic crystal fiber. The power penalty is less than 2.9 dB for all the 10-Gb/s multicast channels spaced at 200 GHz.