40-Gb/s Polarization Multiplexed RZ-ASK-DPSK Signal Wavelength Conversion using a 32-cm Bismuth-Oxide Highly Nonlinear Fiber

Wavelength conversion of a polarization multiplexed RZ-ASK-DPSK signal using four-wave mixing (FWM) in a 32-cm Bi-NLF incorporated in a polarization diversity loop is demonstrated. The 40-Gb/s RZ-ASK-DPSK input signal is combined with a 30-dBm CW pump using a 3-dB coupler. After the FWM wavelength conversion, the output signal at 1546.8 nm is filtered out using an optical bandpass filter. Eye measurements are performed for both the input and the output signals.